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A Standard Specification for Section 04222

SECTION 04222ARCHITECTURAL CONCRETE MA-SONRYGround Face Block, Plus Face Block, Split Face Block, Velour Face Block(Tupelo Concrete Products Suggested Block Masonry Specification)

PART 1 GENERAL

1.01 SUMMARY

A. Provide materials, labor and equipment necessary for the completion of concrete masonry work as indicated on the drawings and specified herein.

B. Related Sections:1. Section 04100 Mortar and Ma sonry Grout.2. Section 04150 Masonry Accesso-ries.3. Section 04200 Unit Masonry.4. Section 04500 Masonry Resto-ration and Cleaning.5. Section 05500 Metal Fabrications: Placement of loose steel lintels.6. Section 07150 Dampproofing.7. Section 07180 Water Repellents.8. Section 07200 Insulationa. Vermiculite/Perlite Loose Fill Insulation.b. Block Insert Insulation.9. Section 07600 Flashing and Sheet Metal.10. Section 07900 Joint Sealers.

1.02 REFERENCES

A. American Society for Testing and Materials (ASTM):1. ASTM C 90-01 Standard Specifi-

A Step by Step Commentary on the Architectural CMU SpecificationSection 04222

INTRODUCTION

Architectural concrete masonry can be selected in many different finishes, colors, siz-es depending on the region they come from and on the manufactures available raw materials. The most popular finishes nationwide are:

Smooth Face Split Face Ground Face Polished Face

This article will concentrate primarily on our DecraStone products and how they comply with codes and specifications and how the specification might be further en-hanced thru supervision in the field or preparation of more in depth construction documents. the intention is to improve the performance characteristics of the build-ing. To that effort a sample suggested Architectural Specification Section 04222 is paired alongside this commentary.

Block manufacturing facilities have am-ple outdoor yard storage for all types and shapes of block. Architectural masonry is always with few exceptions manufactured to order. Getting the specification and con-struction documents correct will be import-ant to the bid and construction processes. Less guessing = a lower price at bid day. An-other advantage is keeping the job running smoothly without having to wait for last minute decisions.

PART 1 GENERAL

These references are “related” paragraphs from specification sections throughout the entire project specification. ASTM designations for concrete masonry are listed here:

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SUBMITTALS

Submittal packages include product literature, color choices, SDS, testing, certifica-tions and other technical backup as required.

The submittal process is important for prebid timing in that the style, color of the ma-sonry and its finish may be tied down at least for bidding purposes. DecraStone sam-ples are available in 3” x 3” boxed sets or individual pieces. Colors are also represented in our website. Submittal packages can be seen on the Resource page of the website.http://www.div2-4.com/colors.html http://www.div2-4.com/resources.htmlhttp://www.div2-4.com/ground-face.htmlhttp://www.div2-4.com/split-face.html

Job mockup panels have traditionally been used for judging workmanship, color, and finish of the wall. Sometimes incorporating these panels with other products such as windows or doors can involve some very special shapes. Planning ahead for these var-ious shapes is imperative. At this point the contractor should display how they intend to protect the vertical surface from job damage and how the tops or cores of the wall will be protected from the rain incursion and subsequent damage. http://www.div2-4.com/protection.html

This is also the best time to incorporate any cleaning processes for effectiveness. If a sealer has been specified then this is where that sealer may be judged for its applica-tion as well as any change in appearance that the sealer may create. http://www.div2-4.com/cleaning.htmlhttp://www.div2-4.com/sealing.html

Architectural Shapes& Colors

DIV 2-4 is a Division of Tupelo Concrete Products, Inc120 North Industrial Road, Tupelo MS 38801(662) 842-7811

A Division of Tupelo Concrete Products

SAFETY DATA SHEET (SDS) CONCRETE MASONRY PRODUCTS

SECTION 1 – IDENTIFICATION Concrete Masonry Products (Block, Architectural Block, Pavers, Segmental Retaining Wall units, Concrete Brick)

Tupelo Concrete Products, Inc 120 Industrial Road North Tupelo, Mississippi 38801 Emergency phone: (662) 842-7811Information phone: (662) 842-7811

Date prepared: Product use:

September, 2017Concrete products are used in a wide variety of applications in buildings and civil engineering projects.

SECTION 2 – HAZARD IDENTIFICATION Emergency Overview:

Potential Health Effects:

Eye Contact:

Skin Contact:

Dermatitis:

Inhalation (acute):

Inhalation (chronic):

Silicosis:

Carcinogenicity:

Autoimmune Disease:

Tuberculosis:

Renal Disease:

Ingestion:

Concrete products vary in size, shape and color, depending on final use. They are not combustible or explosive. Concrete products in their intact state will not release airborne dust, but dust can be produced during dry cutting, dry drilling, dry grinding, dry chasing and other dry machining of the product. A single, short-term exposure to concrete dust presents little or no hazard. Any precautionary statements relating to potential negative health effects is solely in reference to instances where concrete masonry products are being modified by cutting, drilling, grinding in a dry dusty situation. Modification with a water wash is considered safe. Pictograms reference only dry processes to the concrete.

Airborne dust may cause immediate or delayed irritation or inflammation. Eye contact with large amounts of concrete dust can cause moderate eye irritation and abrasion. Eye exposures require immediate first aid and medical attention to prevent significant damage to the eye.

Concrete dust may cause dry skin, discomfort, irritation and dermatitis.

Concrete dust, in association with sweat and friction, can lead to skin irritation and dermatitis. Skin affected by dermatitis may include symptoms such as, redness, itching, rash, scaling, and cracking. Irritant dermatitis is caused by the physical properties of concrete dust such as abrasion.

Breathing dust may cause nose, throat or lung irritation, including choking, depending on the degree of exposure.

Risk of injury depends on duration and level of exposure.

This product contains crystalline silica. Prolonged or repeated inhalation of respirable crystalline silica from this product can cause silicosis, a seriously disabling and fatal lung disease. See Note to Physicians in Section 4 for further information.

Concrete is not listed as a carcinogen by IARC or NTP; however, concrete contains trace amounts of crystalline silica which is classified by IARC and NTP as known human carcinogens.

Some studies show that exposure to respirable crystalline silica (w/o silicosis) that the disease silicosis may be associated with the increased incidence of several autoimmune disorders such as scleroderma (thickening of the skin), systemic lupus erythematosus, rheumatoid arthritis and diseases affecting the kidneys.

Silicosis increases the risk of tuberculosis.

Some studies show an increased incidence of chronic kidney disease and end-stage renal disease in workers exposed to respirable crystalline silica.

Do not ingest concrete. Although ingestion of small quantities of concrete is not known to be

cation for Load-Bearing Concrete Mason-ry Units.(include all referenced documents within)B. National Concrete Masonry As-sociation

1.03 SUBMITTALS

General: Prepare, review, approve, and submit specified submittals in accordance with Section 01300-Submittals. The follow-ing are required for submittals:1. Product Data: Submit product data for each type of product specified, including certification that each type com-plies with specified requirements.2. Samples: Submit verification samples for colors, textures.3. Test Report: Submit test report form from an independent testing agency indicating compliance with ASTM C 90 for concrete masonry units.

1.04 QUALITY ASSURANCE

Mockup (Field Constructed): Install at project site a job mockup using acceptable products and manufacturer- approved installation methods. Obtain Owner’s and Architect’s acceptance of finish color, tex-ture and pattern, joint sizes, and installa-tion workmanship standard. 1. Mockup: One panel shall be constructed to simulate the condition of concrete masonry walls. The panel shall be 4’ long by 3’4” high and shall show the proposed color, texture, bond, pattern, mortar joints and workmanship for con-crete masonry.2. Maintenance: Maintain mockup during construction for workmanship comparison; remove and legally dispose of mockup when no longer required.3. Incorporation: Mockup may be incorporated into final construction upon Owner’s and Architect’s approval.

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1.05 DELIVERY, STORAGE, AND HANDLING

A. Ordering: Comply with manufac-turer’s ordering instructions and lead time requirements to avoid construction delays.

B. Storage and Protection: Store ma-terials protected from exposure to harmful weather conditions.

C. An adequate level lay down area is necessary for proper storage of these ma-terials. Proper damage control procedures in storage should be followed . Refer to the manufacturer for their recommendations.

PART 2 PRODUCTS

2.01 MANUFACTUREA. Acceptable Manufacturers:

1. DIV 2-4A Division of Tupelo Concrete Products, Inc. 120 Industrial Road NorthTupelo, MS 38801Toll free (800) 748-8703 or (866) DIV. TWO4www.div2-4.com

2. Johnsonproductsusa.com3. E. Dillon and Company– edillon.com

B. Proprietary Product(s)/System(s): DecraStone with an integral water repel-lent agent..1. Size(s): Width (W) X Height (H) X Length (L).2. Type(s):• DecraStone Ground Face or Plus Face• DecraStone Split Face• DecraStone Velour Face3. Color shall be selected from the DecraStone standard colors. The selected colors for each application shall be asfollows:(describe location of each uniquely different product and its color)

DELIVERY, STORAGE AND HANDLING

Delivery and Storage of Architectural CMU’s are very viable considerations. Projects require adequate storage space for the many different styles, shapes and colors of block that were specified. Dou-ble stacking is really not a good option as it increases the likelihood of breakage and chipping. Uneven storage and rutted unloading space is not a good investment. Gravel storage areas that have been rea-sonalbly compacted is a wise choice. Typi-cal projects may have from ten (10) to (80) different shapes and separate storage for each is a necessity.

PART 2 PRODUCTS

Acceptable manufacturers are generally limited to about three in a specification. Each should have at least a minimum of 10 years experience in the manufacture of the particular style of architectural cmu’s that have been specified.

There are so many different options that the drawings need to be clear as to what is required at all openings, sills, water tables or transition pieces. Specifying a certain color will allow the manufacturer to be more percise with its bid. Using a manufac-turers standard shape is an economical decision. Rather than think of these products as cast stone our machine manufactured shapes don’t have much flexibility without expensive saw cutting the product to meet a specified size.

A DURABLE FINISH FOR ALL APPLICATIONS

1. An improved smoother finish 2. Excellent adhesion and gloss retention3. Finish is a clear high gloss4. A penetrating sealer5. The face treatment “breathes”6. Excellent UV stability7. Enhances the rainwater resistance provided by the integral water resistant admix incorpo-

rated within the block mix

DIV 2-4 120 Industrial Road North Tupelo, MS 38801(662) 842-7811 or www.div2-4.com

COLORS SHOULD BE CHOSEN FROM ACTUAL SAMPLES GROUND FACE

Autumn Mist

Dark RustDark ChocolateChampagne Cream

Castille WhiteCanary CreamAutumn Rush

Ecru WispDorset Grey

Deep Ash

Provencial Yellow Russet GrainPalermo Vein

Oxford WhiteOcean PearlMoroccan TanMessina Gold

Vintage Granite Kahki Sunrise

Sable StoneSaddle Beige

Pecos Cream

Umber WheatSmokey Sand

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Normal weight classification applies to architectural CMUs because they are rarely made with enough lightweight aggregate to classifiy as “Lightweight”. Lightweight ag-gregates are not used in abundance because they are too dark in color to allow for color development.

ASTM C90 DETAILSFinish and appearance provisions in ASTM C90 prohibit defects that would impair the strength or permanence of the construction, but permit minor cracks incidental to usual manufacturing methods. For units which will be exposed, the presence of objec-tionable imperfections is based on viewing the unit face(s) from a distance of at least 20 ft (6.1 m) under diffused lighting. Five percent of a shipment may contain chips not larger than 1 in. (25.4 mm) in any dimension, or cracks not wider than 0.02 in. (0.5 mm) and not longer than 25% of the nominal unit height. The specification requires that color and texture be specified by the purchaser.

MORTARAn essential element of the wall is utilizing RainBloc for mortar. RainBloc is tested for ASTM C1384 whereas many other additives for off site batched mortars are not. Be-cause the mortar joint makes up a large per-centage of the finished wall, it is imperative that the joint gets as much attention as the cmu.

EVALUATIONRain Bloc test data earns an excellent rating by exceeding ASTM E 514-74, E514-90, E96. Of course a complete water repellent system emphasizes proper masonry design details, and implementation. The water repellent block cannot replace proper flashing, weep holes, and control joints and other necessary details.

INTEGRAL WATER REPELLENT BENEFITS• resists rain water penetration• fights against mold and mildew• maintains masonry colors• resists efflorescence• polymeric-based• permanent• a full-wall thickness water penetration protection system• RainBloc anti-wicking feature ensures that masonry units and mortar strongly

resist water absorption. If rainwater seeps past the exterior face of the wall, the RainBloc system’s water repellent properties minimize the amount of water that can be absorbed into the concrete. http://www.div2-4.com/resources.html

C. Product(s)/System(s)/Testing: an Architectural Unit Product Standard:1. Comply with ASTM C 90 for con-crete masonry units.• Minimum Net Area Average Compressive Strength: Average of three units 1900 PSI, individual unit 1700 PSI.• Maximum Absorption: The ab-sorption rate shall not exceed 13 lbs/CF.• Weight Classification:. Normal Weight (not less than 125 lbs/CF).

• RainBloc certification by ACM Chemistries.• All units shall have an integral

water repellent within the mix design of the products. RainBloc for mortar will be used in all mortar incorporated into walls with architectural masonry.

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SEALING

A quality sealer is essential for job protection. A post applied sealer should be con-sidered for protection during the buildings normal occupancy and for the addition-al beauty enhancements as wel as the protection that the added sealer provides. http://www.div2-4.com/sealing.html

Factory sealing is essential for protecting the block against mortar and dirt. Howev-er depending on the cleaning techniques utilized on the job some of the sealer may ber removed. A job applied sealer is an elec-tive that will allow the block to be enhanced and further protected during the life of the building.

SOURCE QUALITY CONTROLComputerized color control is essential to consistency. Liquid color control dispenses the color better in the mix for cmu mix designs like those employed for archiectural concrete masonry. The result is a wall with block units in a uniform color range. The computer software allows for precise measuring of the liquid color. Generally four (4) colors are blended together to obtain the specified unique color for DecraStoneproducts. The red framed tote container contains a precision pump that is controlledby the software. The liquid totes are environmentally friendly preventing waste andare entirely reclycable.

• All Ground Faces shall have afactory applied sacrificial coating of acrylicsealer with a minimum25%solids content to reduce job soiling.• Field applied sealer if requiredshall be TK Bright Kure & Seal (for a semigloss finish). Refer to product literature forspecific product description. All productsare distributed by Tupelo Concrete Prod-ucts. (this paragraph requires modifica-tion as to whether a field applied sealer isrequired or not)

2.02 Source Quality Control

A. Obtain Architectural ConcreteMasonry Units from a single source toensure color, finish and texture continuity.B. Manufacturer shall not have lessthan ten (10) years experience in the pro-duction of Architectural Masonry Units.C. Manufacturer shall use a comput-er controlled liquid dispensing system forthe complete dispersion of color.

PRODUCTSCONCRETE TREATMENTS & COATINGS

®

Division of Sierra CorporationISO 9001:2008 CERTIFIED

VOC Regulatory Compliance:

TK-BRIGHT KURE & SEAL Curing and Sealing Compound

Item No. TK-BR.K&S

AIM LADCOOTC SQACMD CANADA

Page 1 of 2TK-BRIGHT KURE & SEAL

PRODUCT DESCRIPTION TK-BRIGHT KURE & SEAL is a blend of 100% methyl/methacrylate polymers used as a superior curing, sealing and protective compound for exposed aggregate, colored concrete and other decorative concrete and masonry surfaces. Features:• Coating dries clear and does not yellow with age or exposure to ultraviolet rays.• Providessuperiorprotectionagainstfreeze/thawcycles,deicingsalts,andchemicalerosionandefflorescence.• Reducesthepossibilityofaggregatepopoutsonexposedaggregatebypercolatingdownandaroundthestonestofillgapsandvoids.• Formsadurablelong-lastingfilmwithresistancetowater,chemicals,abrasionandstains.• Highlightsandpreservesthenaturalpigmentsinthesurface,addinglongevityandsparkletothefinishedproduct.• Does not discolor with over-use.

USES: Suitable for interior or exterior use on new or existing architectural concrete, burnish block, terrazzo, brick, stone, slate, quarry tile or other cementitious materials. Ideal for exposed aggregate and colored concrete surfaces, paving block, patio stone, driveways and garage floors.

APPLICATION PROCEDURES:PREPARATION: Surfaces must be clean, dry and free of form oils, grease, dust, frost and curing compounds (particularly wax based). Large areas may be blown dust free by compressed air, washed and let dry. Surface water must be allowed to completely dissipate before applying. Exposed Aggregate Application Preparation - When applying to exposed aggregate as a curing compound, the surface should be washed with a mild acid solutiontoremovethethinfilmofcementdust,thenflushedwithwaterandallowedtodrybeforeapplyingTK-BRIGHTKURE&SEAL.

At this point a small mock-up area should be applied in an inconspicuous location to test the compatibility of the coating with the prepared substrate. Allow the coating to dry and cure fully, then inspect for proper film formation, gloss, adhesion and confirm that the film is free from whitening or anyother defects.

MIXING:The material is ready for use and requires no mixing or dilution. It is unlawful to further dilute with non-exempt solvents.

APPLICATION:TK-BRIGHT KURE & SEAL WILL DARKEN

CONCRETE.Apply using a low pressure (30-40 lbs.) sprayer,

roller or long nap applicator. Work the compound into the concrete avoiding accumulations, puddling,runs or sags. On large areas, an airless sprayer may be used.

Note that concrete must be fully cured (looks uniform in color) and dry at the time of application.This eliminates the possibility of moisture becoming trapped between the film and the concrete slab,resulting in a white haze on the surface. If a white haze does develop, a second application of TK-BRIGHT KURE & SEAL will emulsify the film andallow trapped moisture to escape. The coating will then be able to reharden clearly.

CLEAN UP:Use TK-00 XYLENE* to clean tools and equipment.

Pump solvent through the sprayer to remove residue of materials which can clog the hose and wand assembly.

CARB

TECHNICAL DATAComposition and Materials: A blend of 100% methyl/methacrylate polymers in a fast drying

aromatic solvent. No fillers are used and there are no oils, waxes or saponifiable resins. TK Products are manufactured with only the finest quality raw materials available and close quality-control

is practiced.

Percent Solids: 26%

Flash Point: 105°F

Drying TimeTack Free:Open toTraffic:

1 hour2 hours

VOC Content: < 700 g/l

A.I.M. Category: Curing and Sealing CompoundMaximum VOC 700 g/l

Applicable Standards: -ASTM C-1315,Type 1, Class A, B & C- ASTM C-309,Type 1, Class A & B and Type 1D with a red dye added.-Fed.TTC-C-800A,Type 1, Class 1-AASHTO Des. M-148,Type 1, Clear-DE CRD - C-300

- Approved by the Resilient Tile Institute to be compatible with most resilient tile, carpet adhesives and most paints.

- USDA authorization for use in meat, poultry and food processing plants.

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PART 3 EXECUTION

Our pallet labeling includes basic cleaning instructions, the job name, the product code. Basic instructions for the jobsitehttp://www.div2-4.com/resources.html

INSTALLATION - RAIN PROTECTION

Wet block walls are the most contentious problem that is faced in the construction of architectural masonry walls. Solutions can be simple. Simply cover the tops of the walls and prevent water intrusion at band, caps, quoins and other trim pieces with caulk or sealants. If these simple procedures are followed the wall will not look like the adjacent photos and countless other issues will not show up. Rain protection is not a difficult problem to solve and will save many hours of frustration. Water repellant in the block masonry will not stop a flood of water entering and staying in the cores of the block. The water must exit somewhere and since the block breathes the water will go to the exterior surface of the block. Water repellancy does not mean water proof. Wind driven rains into the side of the block will quickly dry out under normal condi-tions. Mortar joints as addressed below must be installed correctly to prevent water penetration as well. http://www.div2-4.com/staining.htmlhttp://www.div2-4.com/resources.html

RainBloc is easily installed into the mix on site. Integral mortar admix installed in prepared totes at an offsite facility should have available a certification that the ad-mix that is incorporated. Only specified admixes listed under “Products” in the specification should be approved. In lieu of the pre-approved admix then adequate testing should be submitted for final ap-proval.

PART 3 EXECUTION3.01 Manufacturer’s Instructions

A. Compliance: Comply with manufac-turer’s product data, including product technical bulletins, packaging notices, and product catalog installation instruction.

3.02 Examination

Site Verification of Conditions: Verify that substrate conditions (which have been previously installed under other sections) are acceptable for product installation in accordance with manufacturer’s instruc-tions.

3.03 Preparation

A. Adjacent Surface Protection: Protect ad-jacent work areas and finish surfaces from damage during product installation.

3.04 Installation

A. General: Refer to Division 4 Masonry Section for installation require-ments.

B. Rain Protection: At the end of each day, the freshly laid architectural block walls must be covered with plastic having an 18” overlap on each side of the wall to prevent water intrusion. All walls are to remain covered until such time as the roofing system has been attached to the walls.

C. Pattern: Install Architectural Concrete Masonry Units in pattern indi-cated on drawings. Maintain pattern lines. Match approved job mockup.

D. Mortar: Reference Section 04100. All mortar in exterior walls shall contain the recommended amount of RainBloc or DryBlock mortar admixture for water repellency.

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JOINTING

Mortar joints are described and recom-mendations made on our website. Using a correct functioning mortar joint will pre-vent moisture intrusion rather than en-courage it. A full mortar bed and full head joint is also important to a watertight wall.http://www.div2-4.com/mortar-joints.html

CONTROL JOINTS

Flashing, caulking, sealing of expansion and control joints should be accomplished as soon as the wall and adjoining surfac-es are in final position so the moisture will not enter the building’s exterior wall and damage either the exterior or interior sur-faces. The adjacent picture shows an open joint between the masonry and the panel. The job is not complete, however, rain is pouring into the wall causing problems. Waiting to seal the joint only causes mois-ture issues. Drying the wall will take time especially in the winter.

VISUAL ACCEPTANCEVisual appearance is of course subjective. A properly tooled mortar joint and will en-hance the appearance of the wall with consistent color and lines that flow vertically and horizontally nicely. Counting the dark or light specs of gravel in the face of the cmu is not a proper way to judge the face. Aggregates are natural and will vary in color and size.

E. Jointing:

1. Exposed vertical and horizontal joints shall be solidly filled as the work progresses. After joints are thumb print firm, they shall be tooled to a tight, smooth concave surface with an approved tool. Joint widths shall be 3/8” inch.2. Mortar joints shall not be cross-bedded at flashing areas.

3. Control and expansion joints shall be continuous through the mortar and masonry, at a maximum of 40’– 0”, unless otherwise shown. Horizontal reinforcement, except at roof or floor dia-phragm, shall be continuous through the control joint.4. When scored blocks are used, the center joint shall be filled with mortar and tooled to match adjoining joints.

F. Elevation Tolerances: Elevations of installed Architectural Concrete Mason-ry units do not exceed 1/4” in 10’ or 3/8” in a story height of 20’ maximum, except for external corners, expansion joints and other conspicuous lines, do not exceed 1/4” in any one story or 20’ maximum.

G. Visual Acceptance: At a distance of no more than 20 feet and no less than 15 feet the completed wall shall not reveal imperfections such as chips and cracks and crazes that would otherwise impair the wall’s overall appearance. H. Expansion and Control Joints: Refer to Division 4 Unit Masonry section for expansion and control joints.

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CLEANINGOur webpage as well as the Sure Klean website has detailed references to clean-ing architectural concrete masonry The most important factor for cleaning ma-sonry is a daily cleaning procedure to insure mortar is not building up on the surfaces of the wall. This will eliminate scraping of the walls which inevitabley creates scratch marks. Wiping or brushing off the wall on a regular daily schedule will pay enormous dividends. http://www.div2-4.com/cleaning.html

CLEANING PRODUCTSRegarding cleaners: use those specified herein and do not use any others as their results have not been tested. For example: Lime Solvent 101, Vanatrol and SureKlean 600 are NOT recommended. They are spe-cifically designied for clay brick not archi-tectural conrete masonry and definitely not DecraStone cmu’s.

3.05 Cleaning and Protection

A. Cleaning:

1. Good workmanship and job housekeeping practices shall be used to minimize the need for cleaning the mason-ry. Masonry wall should be dry-brushed at end of each day’s work and also after final pointing and should be left clean and free from mortar droppings. Protect the base of the wall from mud splashes and mortar droppings. Protect the wall by setting scaf-folds so that mortar is not deflected onto the wall, and at the end of each day set the scaffolding boards so that they do not deflect rainfall onto newly laid masonry. The masonry laying technique shall be such that mortar does not run down the face of the wall, or smear the masonry face, after the joints are tooled. Cut off mortar tailings with the trowel and brush excess mortar burrs and dust from the face of the masonry.

2. For Split Face and Smooth Face: If after using the above outlined techniques, and additional cleaning of masonry is nec-essary, then the technique, solutions and test area shall be approved by the architect. The masonry shall be thoroughly saturated prior to and at the time the cleaning solu-tion is applied. Clean the masonry only with an approved cleaning solution (Water, Soap, or Sure Klean Custom Masonry Cleaner no stronger than a 1:6 cleaner to water ratio) with a brush starting at the top of the masonry. The method of scraping shall be as outlined on the container by the manufacturer. Immediately after cleaning a small area, the masonry shall be rinsed thoroughly with quantities of water suffi-cient to rinse cleaning solution completely. Pressure rinse with 400 psi at a water flow rate of 4 to 8 gallons per minute and a 40 degree fan spray tip. Reduce water pressure to avoid damage to delicate masonry.

3. For DecraStone Ground Face: If after using the above outlined techniques and additional cleaning of masonry is nec-essary, then the technique, solutions and test area shall be approved by the architect. The masonry shall be thoroughly saturat-ed prior to and at the time the cleaning solution is applied. Clean the masonry only with an approved cleaning solution (Water, Soap, or Sure Klean Light Duty Concrete Cleaner with a dilution rate of no stronger than 1:6 and apply with a pump

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PROTECTIONProtection of the finished DecraStone wall should be a priority. The normal proce-dure is to have the sub-contractor return to the job and repair at extra costs these damaged areas. There are many exam-ples of wall damage that can easily be pre-vented that are covered at our website. The damaged wall can never be adequate-ly repaired to resemble the desired wall. So much easier to keep it protected. http://www.div2-4.com/protection.html

SEALINGSealing the installed wall can provide ben-efits beyond those of the factory sealed wall. http://www.div2-4.com/sealing.html

up sprayer not to exceed 50 psi.) with a brush starting at the top of the masonry. The solutions and the method of scraping shall be as outlined on the container by the manufacturer. Immediately after cleaning a small area, the masonry shall be rinsed thoroughly with quantities of water suffi-cient to rinse cleaning solution completely. Pressure rinse with 400 psi at a water flow rate of 4 to 8 gallons per minute and a 40 degree fan spray tip. Reduce water pressure to avoid damage to delicate masonry.4. Remove temporary coverings and protection of adjacent work areas. Repair or replace damaged installed products. Re-move construction debris from protected site and legally dispose of debris.

B. Protection: Protect installed product’s finish surfaces from damage during construction. Reference Paragraph3.05.A.1 above.

C. Sealing of Ground Face Block and Plus Face Block: It is recommended that after all cleaning procedures have been fol-lowed then these units may be sealed with an evenly applied coat of TK Bright Kure & Seal (a 25% minimum solids based acrylic sealer) without forming runs or drops. Follow instructions for application by the sealer manufacturer for correct results. (this paragraph requires modification as to whether a field applied sealer is required or not)D. Sealing of Split or Smooth Face Block: After all cleaning procedures have been followed then the units may be sealed with an evenly applied coat of TK Bright Kure & Seal matte finish, without forming runs or drops. Follow instructions for application by the sealer manufacturer for correct results. (this paragraph requires modification as to whether a field applied sealer is required or not)