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Introduction

Glass blocks are a timeless building material, yet over the past 50

years they’ve gone in and out of fashion depending on the trends

of architectural design. Since the 1980s there has been a steady

increase in the use of glass block in commercial and residential

construction.

Invented in Europe in the early 1900s as thin blocks of glass sup-

ported by a grid, glass blocks fell out of favour for a while before

resurfacing in the 1950s as a decorative building material. But it

was a short-lived love affair as 1960s architecture began to stress

the minimalist look. Then two trends combined to bring glass

block back into demand. During the 1970s there was a move

away from the sparse look in architecture, and in the early 1980s

a trend for the feel of the 1950s began.

Glass blocks are not only decorative - they also have several

functional advantages that make them attractive. Lots of natural

light will filter through a glass block window, while at the same

time, the patterns on the glass blocks create varying degrees of

privacy. They have the insulating value of a 12” thick concrete

wall or an insulation R value of 2.0 (similar to a thermal pane

double-glazed window). Due to the large enclosed air space,

condensation problems normally experienced on conventional

windows are not seen on glass blocks (if installed correctly).

Glass blocks provide acoustical benefits by reducing outside

noise. They also provide a degree of security unavailable from an

ordinary flat-glass window, while eliminating the need for expen-

sive window coverings, which only reduce light transmission.

Advantage/Mulia Glass Blocks

Until recently, glass blocks remained in the realm of architecture.

In the past, an architecturally designed home with a glass block

panel was a magnificent sight. But as installation techniques

become easier, more homeowners are looking to glass blocks for

their own home improvement projects.

Homeowners are discovering the benefits of glass block panels

for windows, walls, dividers and even furniture. In Europe, as

much as 40% of all glass blocks sold are used by the do-it-your-

selfer.

Designing with Glass Blocks

Mulia glass blocks are made from two sections of pressed glass,

which are then fused together to create a partial vacuum inside

the unit, with the pattern on the inside face.

If privacy is the main concern, the wall or window should be built

of blocks that will distort any images. The busier the pattern, the

greater the distortion.

There might be a trade-off between your need for privacy and

your desire for natural light, but keep in mind that even a clear

block in combination with the mortar grid will provide some dis-

tortion of image. To help keep the trade-off to a minimum, you

might want to design a glass block wall using a combination of

patterned and clear blocks. The clear blocks could be grouped in

areas where you want to retain the view or let in the most

amount of natural light.

In replacing an existing window with glass blocks, you are not

limited by the size of the opening. Combinations of different

block sizes can be used to retrofit openings where standard mul-

tiples of blocks will not work, or where a more interesting design

concept can be made while greatly reducing material costs.Two

examples are shown here to illustrate the possibilities. In new

construction, however, the size of the blocks can be considered in

the preliminary design stages, to allow you the broadest choice

of pattern and size. See sketches on next page:

This example shows 2 panels, each 36” X 36” — one using a

combination of sizes and the other using all the same size of

block.These two panels are identical in size yet one contains 36

blocks while the other contains 25 blocks (in a symmetrical com-

bination). Cost per individual block is identical in this case yield-

ing an approximate 30% saving on material and labour with the

25-block option.

Why Architects Use Glass Block

Architects have always had a strong attraction to glass. It’s a

versatile material — hard while also being translucent or trans-

parent. Glass blocks offer the architect the excitement of glass,

while offering many of the advantages of masonry material.

Glass blocks are an important element in current design trends

and their qualities make them welcome in any renovation, new

home design or commercial application.

Few construction materials offer all the benefits associated with

glass blocks — natural light, openness, strength, attractiveness,

coupled with a high degree of privacy and security, and reduced

sound transmission.

With glass blocks, you can build an expanse of wall with only a

thin mortar line between the rows of blocks. No other visually

distracting construction material is necessary (within size limits).

The maximum exterior panel area is 144 sq.ft. with the width no

longer that 25 ft. and a maximum height of 20 ft. Interior panels

can be a maximum of 250 sq.ft. These calculations are based on

the used of 3-7/8 thick blocks. If you use 3-1/8 thick blocks, the

maximum exterior area you can cover with a single panel is 85

sq.ft. The maximum interior area is 150 sq.ft., again with a height

of no more than 20 ft. If your opening is larger than these sizes,

a series of panels is necessary with each panel supported by a

structural frame and expansion joints.

Curved walls are one of the most beautiful applications of glass

blocks. A curved wall can round out to catch more light, dip back

to the wall line again, go straight for a bit, then curve out once

more. There is no end to the variety of design offered.

Whether they are clear for maximum visibility or textured to pro-

vide privacy, glass blocks will always create a feeling of open-

ness.

There are many interesting applications for glass blocks. For

example, if you would like an island in your kitchen, but a solid

island would appear too heavy, make the base from glass blocks

Channel-type restraint 144 85

Panel anchors 144 85

Channels or panel anchors

w/intermediate stiffeners 250 150

Channel-type restraint 250 150

Panel anchors 250 150

interior

interior

thick series thin seriesPerimeter Support Method

Maximum Panel Dimensions

area (sq. ft.) area (sq. ft.)

to lighten the appearance. Or you may want a bar in a recreation

room but again a regular bar would appear too massive. The

base can be created from glass blocks while the bar top can be

supported by wood columns at either end. Shower installations

can surround the entire enclosure or be as simple as light panels

inserted anywhere in the drywall.

Glass blocks offer a degree of security that is not offered by an

ordinary glass window. Since the blocks are 3” to 4” inches

thick, they offer protection against forcible entry or breakage.

Basement windows are particularly attractive to intruders

because they are small, at ground level and are usually in a spot

that will prevent detection of the intruder.

Sidelights next to the front entrance are a favorite of intruders as

well, since it is simply a matter of breaking the glass and reach-

ing in to unlock a deadbolt to gain access.

Replace basement windows and sidelights with glass blocks and

you restrict access to your house without sacrificing any natural

light transmission.

Working with Glass Block

Glass blocks are not load-bearing and must be used in conjunc-

tion with a steel lintel (angle iron) or a wood header. This is no

different from typical construction details for a conventional win-

dow installation.

The panel must be independent of the main structure.There

must be a cushion between the panel and the surrounding con-

struction material. Yet the blocks are still tied to the surrounding

structure.

Glass blocks are treated somewhat like bricks with the panel

being built from the bottom up, block by block.

It is true that a glass block project is only as good as the crafts-

manship employed, but there are no great secrets to masonry

work.

With the use of spacers, you can keep the mortar joints even and

prevent bulges in the rows of blocks. So the only remaining trick

to the masonry work is preparing and handling the mortar.

Mortar is the adhesive that will hold your glass blocks together

and give your project its strength. The quality and durability of

your glass block panel will depend on the quality of the mortar

you prepare. A mortar that is too runny or too dry won’t work.

You should mix to a consistency of peanut butter in order to

achieve a durable bond with optimal holding power. One bag of

our pre-mixed glass block mortar (20 kg) will lay approximately

25-3” blocks or 20-4” blocks. Our pre-mix mortar incorporates

latex acrylic polymers to increase water resistance.

Using Installation Accessories: Spacers, Anchors, Expansion, Reinforcing

Kreuz plastic spacers — called a laying cross — were originally

invented in Austria.The crosses at each end of the spacer sit on

either side of the glass block providing horizontal rigidity while

the bridge sits down in the vertical mortar bed.

The tabs at the outside of the

spacers keep the wall plumb

as it goes up. These tabs

snap off when twisted to

allow easy striking of the

mortar joint.The main body

of the spacer remains embed-

ded in the mortar, providing

uniform quarter-inch horizon-

tal and vertical joint spacing.

The support provided by

these spacers allows con-

struction of large spans with-

in a single day with no need

to wait for mortar to harden.

Glass Block Spacer

(specify thickness 3” or 4”)

These versatile plastic spacers are a key “enabling technology”

which ensures that consistent mortar lines are within the reach

of anyone who wants to produce a glass block project.

A glass block panel cannot support any structural weight other

than its own. That means you can not tear down a load-bearing

wall inside your house and replace it with a glass block wall —

unless you provide an integrated supporting structure.

This also means that no lintels or structural pieces of any kind

that support weight can rest on top of the glass block panel.

Lintels must be supported by other structural members. An

expansion joint is placed between the glass block and lintel, act-

ing as a cushion in the case of any lintel deflection.

As mentioned earlier, panels must be independent of the main

structure. This means the panel cannot be mortared directly to

the building for fear of cracking during the differential expansion

and contraction of the surrounding materials. The panel is there-

fore surrounded by an expansion joint at both jambs and at the

head position.

There are three methods of providing panel support: chase con-

struction, channel construction and panel anchors. In chase con-

struction, the edges of the glass block panel are built so that

they fit into a wide groove or channel formed directly into con-

crete jambs.

The second method of securing a glass block panel is channel

construction. In this system, the glass block panel sits in a metal

channel that is fastened to the jambs and head of the opening.

With the panel anchoring method, two-foot-long, hot-dipped, gal-

vanized steel panel anchors are secured into the mortar joint

above the first course and then at 16”-24” intervals thereafter,

with the last anchor placed directly below the top block. A 16”

length of anchor is buried in the mortar, the other 8” is bent and

fastened directly to the jambs and/or head (depending on appli-

cation).This method allows for full view of the glass blocks

around the edges of the panel since the block edges are not

buried in a channel support.

Below: Chase and Channel Construction

Photo above: Panel Anchor

It may appear contradictory when to say that a panel must be

independent from the main structure, and then explain how to

secure a panel. However, in each of these anchoring cases, the

panel is separated from the main structure by means of an

expansion strip that is usually a compressed polyfoam material.

The panel anchor must not come into contact with the glass

block (because of the different expansion rates), so make sure the

anchor is buried in the middle of the mortar bed.

To install four-foot hot-dipped galvanized steel ladder reinforcing,

place the lower half of the mortar bed, press the reinforcing into

place, then cover the reinforcing with the top half of the mortar

bed and trowel smooth. Keep the metal ladder in the middle of

the mortar bed to avoid contact with the glass blocks. Overlap

the steel ladder reinforcing by a minimun of 6” to maintain con-

tinuous reinforcing without bridging the expansion material.

Three Spacers in One

Each glass block installation will generally require the use of all

the three possible spacer variations: “Regular”, “T” and “L” spac-

ers.To create “T” and “L” spacers, simply cut off the indicated

parts of a “regular” spacer.

Regular

L

T

Use wherever 4 blocks meet. Do not

remove end caps until installation is

completed.

Remove end cap and two legs (shown

dotted) from each end of a regular

spacer to form an “L” spacer. Use for

corners against sill, jamb and header.

Remove one half of end cap and upper

extension of vertical leg from each end

of spacer (shown dotted). Use for blocks

placed against jamb, sill and header.

Spacer Application Guide:

Tools and Accessories Required:

• Glass blocks (choose either 3 1/8” or 3 7/8” width).To determine

the number of blocks required, divide each of the opening dimen-

sions (horizontal and vertical) by the nominal size of the block

used (i.e. 8”). Multiply the number of horizontal blocks by the

number of vertical blocks to determine the total number of blocks

required. (opening should always be a multiple of the nominal

block size + 1/4” – i.e. 10 blocks = 80 1/4”)

• Glass block spacers (specify correct size to fit block thickness).To

calculate quantity of spacers required, multiply number of hori-

zontal glass blocks plus one by the number of vertical glass blocks

plus one (i.e. 2 X 2 blocks requires 9 spacers, see diagram on page

9).

• Panel Anchors

• Expansion Strips

• Panel Reinforcement

• Glass Block Mortar

• Screws (3/4” or 1” long) and Plugs (if

required).

• Mortar Trowel, Brick Jointer, Level, Plumb Line, Sponge.

• Caulking Gun with Silicone Sealant

Tabs hold face of

blocks aligned

and flush

Bears weight so

mortar does not

float.

How the Glass Block Spacer Works

Does not obstruct

panel anchors or

re-inforcing

Glass block is

held secure dur-

ing installation

Maintains perfect

horizontal and

vertical joint

End caps simply

twist off after

installation

Canada Classified UL®

Glass Block Installation

Material Plastic mortar

joint spacers classified

by Underwriters

Laboratories Inc. R18127.

Preparation

• After preparing the work site, first install panel anchors to tie

the panel into the jambs of the opening. Anchors will be

embedded in mortar during installation of block. Bend the

anchor into a “L” shape with an 8” vertical leg and a 16” hori-

zontal leg. Attach vertical leg to the jamb with appropriate

fasteners. Additional panel anchors must be placed after every

third 6” block or after every second 8” or 12” block.

• Install expansion strips, trim strips to proper width and attach

to head and jambs.

• Prepare “T” and “L” spacers by removing legs from regular

spacers.

Installation Note:

Don’t place mortar between glass blocks and expansion strips.

Laying the First Course

• Apply mortar to the prepared sill.

• Place an “L” spacer in the corner, seating it squarely against

the jamb and the sill.

• Seat the first block into the corner, resting it on the mortar.

Add a “T” spacer under the corner of the block that is not

already supported by the “L” spacer. Place the spacer under

the block against the sill and seat the block into position.

• Place a regular spacer on the free upper corner of the block.

• Apply mortar to the vertical side of a second block and put

that block into position, using spacers to maintain joint spac-

ing. Seat block horizontally and vertically.

• Repeat process to end of first course of blocks

• Inspect work periodically to check accuracy, level and plumb.

Make any necessary corrections before proceeding.

Continue the Installation

• Clear mortar from the legs of the spacers to ensure an accu-

rate mortar joint.

• Install block as

described for begin-

ning course.

• At courses requiring

panel anchors, embed

anchor into centre of

mortar bed.

• Panels over 25 square

feet require panel re-

inforcing to be used,

with panel anchors.

Embed re-inforcing

strips in mortar as

each course is finished. Overlap re-inforcing strips by 6” when

joining pieces.

• At head (top course), place spacers before inserting block. No

mortar is used between the header and the block. Use expan-

sion material between block and head.

Finishing and Clean-Up

• After mortar has begun to set (thumbprint-hard), twist off

spacer end caps and discard. Strike joint with brick jointer to a

concave smooth finish.

• Before mortar has dried, remove excess with a damp sponge

or cloth. Rinse cloth often with clean clear water. Film and

residue on the block faces can be removed later with a dry

cloth.

• Use silicone caulk/sealant around the perimeter of your instal-

lation.

Expansion Joints

A straight exterior panel that is larger than 144 sq.ft. (13.4

sq.metres) must be built from a series of smaller panels. These

smaller panels are fastened together by a series of supports and

expansion joints.

Although there are various ways of creating expansion joints,

each joint contains compressed polyfoam to absorb movement in

the panels. To join the two panels, visible or hidden attachments

may be used. As shown in Diagram A, a stiffener is used that is

visible on one side. The stiffener provides the necessary rigidity

to support the large panels being joined. The expansion material

is located between the stiffener and the block wall to provide a

cushion for movement.

For a continuous wall of glass blocks without any visible sup-

ports on either side, the steel plate shown in Diagram B is the

answer. The steel plate acts as a double jamb and serves to

separate the panels into two individual framed panels.

If constructed properly (that is, by using adequate steel reinforc-

ment) glass blocks have a fire rating of 45 minutes, which allows

them to be used in areas where ordinary flat-glass windows can-

not. Maximum allowable size in a masonry opening is 120 square

feet. Maximum allowable opening in drywall is 94 square feet.

Neither dimension should exceed 10 feet.

Glass blocks are rated by ULC for a 45-minute fire rating which

will actually allow a 1-hour fire separation if the materials sur-

rounding the glass block are 1-hour fire rated.

Fire-rated glass blocks must be installed according to the follow-

ing diagram in order to qualify for ULC approval.This requires

anchors and steel reinforcing above the first horizontal course,

and at every second course thereafter, and with the last anchor

and reinforcing placed directly below the top block. Panel

anchors must also be used from the head down at 16” intervals.

ULC Fire Ratings

The steel plate provides

rigidity while expansion

material covers both sides

of the plate to allow move-

ment. Both the steel plate

and the polyfoam expansion

material are less wide than

the block to allow room for

caulking. Where steel plates

are used, panel height

would be limited to 10 ft. (3

metres).

In Diagrams C and D, the

expansion joint is more visi-

ble. It can be incorporated

into the glass block panel as

a design element.These

configurations use two U-

channels to hold the glass

block.The U-channels are

either joined together by a

mullion (C), or simply con-

nected back to back (D).

A

B

C

D

Right column: Four Different Types of Expansion Joints: A, B, C, D.

Fire-Rated Panel Anchor Construction:

Wall framing shown

here for illustrative

purposes only. Wall

framing can be

concrete, masonry,

wood, steel, fire-rated

drywall or any other

structural surround.

Lintel or Header

Expansion Strip

Panel Anchor

Panel Re-inforcing

Glass Block

Asphalt Emulsion

Mortar

Fire-Rated

Caulking

Expansion

Strip

Panel Anchors

Two Bolts

or Screws

per Anchor

Curved Walls

Curved walls have their own special requirements for expansion joints.

Regardless of size, an intermediate expansion joint must be placed in the

wall every time a curve changes direction or where a curved section meets

a straight wall. The radius of the curve is also restricted. See the follow-

ing table for radius

options available with

different sizes of glass

blocks. Special

tapered spacers

accommodate these

radius options. These

spacers can also be

opened up slightly to

accommodate minor

adjustments to the

radius options listed.

3 1/8” 5/8” 1/8” 1/4” 19 1/2” 29 5/8” 39 7/8” – 8 11.25˚ ABK-RO1

5/8” 1/4” 1/4” 25 1/8” 37 7/8” 50 1/2” – 10 9.0˚ ABK RO2

3/8” 1/8” 1/4” 39 3/8” 59 3/4” 80 1/8” – 16 5.625˚ ABK-RO3

3/8” 1/4” 1/4” 76 1/8” 114 3/8” 152 1/2” – 30 3.0˚ ABK-RO4

3 7/8” 5/8” 1/8” 1/4” 24 1/2” 37 1/4” 49 7/8” 75 1/4” 10 9.0˚ ABK RO5

5/8” 1/4” 1/4” 30 1/4” 45 1/2” 60 3/4” 91 1/4” 12 7.5˚ ABK-RO6

3/8” 1/8” 1/4” 49 3/8” 74 3/4” 100 1/4” 151 1/8” 20 4.5˚ ABK-RO7

3/8” 1/4” 1/4” 101 5/8” 152 1/2” 203 3/8” 305 1/4” 40 2.25˚ ABK-RO8

3 7/8” 3/8” 3/16” 1/4” 4 22.5˚ ABK-ALBAllbend®

Blo

ck w

idth

Outs

ide Ver

tica

l

Inside

Vertica

l

Horiz

ontal

4 in

ch b

lock

6 in

ch b

lock

8 in

ch b

lock

12 in

ch b

lock

No. o

f blo

cks

in 9

0˚ a

rc

Angle

in d

egre

es

Product

Code

B:Mortar Joint

Thickness

Nominal Block Size

& Actual Inside Radius

(in inches)A

B C D

E

90 Degree Corner Options

Here are four methods to get you around corners: Diagram A

shows two glass block panels formed into a 90∫ angle by the use

of a wood post or steel tubing. The post or tube is covered from

floor to ceiling with a steel or aluminum angle. The flanges of

the angle must be long enough to overlap the glass block panels

on both sides by 1 inch. Expansion joint material is placed

between the glass block and the post or tubing. The inside cor-

ner is covered with a steel or aluminum “T”. Two of the ”T”

flanges cover the corner while the third flange fits into one of the

expansion joints. Again, the inside corner flanges must cover the

glass block face on each side by

1 inch. Expansion material is

stuffed into the edge of each

flange, then a bead of caulking

is run between the flange and

the glass block to seal each

joint.

Diagram B shows a variation of

the above corner-making

method. In this version, the

steel tubing or wood post is left

visible without any aluminum

angle attached. The posts act as

jambs. An expansion strip is

placed between the glass block

panel with panel anchors to tie

the glass block panel to the

post.Then a bead of caulking is

run between the post and panel

to seal the joint.

Diagram B

Diagram A

Diagram C shows a stepped cor-

ner. The first diagram showed a

post covered with a steel or alu-

minum angle. In the stepped-

corner method, the post is elim-

inated and the angle is reversed.

With the angle secured to floor

and ceiling, channels are

attached to each side of the

angle and the channel method

of securing glass block panels is

followed.

The most pleasing 90 degree

corner is that made with a spe-

cial corner block which offers a

smooth seamless appearance

without the interference of con-

trasting materials (Diagram D).

The limitations of this block,

however, are that it is available

only in wave design.

Diagram D

Diagram C

Specialty Blocks

End blocks in both 8 X 8 X 3 1/8” and 8 X 8 X 3 7/8” are now

available with rounded finished ends.This allows construction of

walls with exposed vertical or horizontal edges, with a totally fin-

ished appearance (wave pattern only).

As mentioned above, there is also a 90 degree corner block in

wave pattern, intended to help create a seamless corner. It will

accomodate either the thick or thin block series.

Pre-Cast Panel System

Entire glass blocks panels can be pre-assembled in our factory,

based on the number of modules needed to complete a project.

We can work with you if you require design assistance or prepare

panels from your plans or drawings.

Our panels are normally manageable by one or two people who

will then do the final erection at the work site. Even curved or

serpentine walls can be pre-constructed. Replacement or infill

panels for any size window or wall opening can also be pre-fabri-

cated. Just call or fax us with the measurements and we will

create drawings showing the different possible combinations of

blocks required to fill the opening. The drawings will show the

correct positions for wall panel anchors, horizontal joint reinforc-

ing, spacers and expansion material. The locations are important

due to the need to tie the blocks to the surrounding structure,

yet still allow for expansion and contraction.

The finest materials go into our special mortar mix such as latex

and acrylic bonding agents for superior thermal shock and water

resistance. The final installation time is reduced dramatically

over laying loose block, yielding great savings on labour costs

while providing a superior quality finished appearance.

Smaller panels of up to 15 sq.ft. can be produced using a clear

construction-strength silicone which allows a seamless appear-

ance.

Typical Physical Properties of Glass Blocks:

Available Patterns:

Wave

Ocean View

Quadra

Diamond

Bromo

Ice

Wave Finishing End(8X8X4) and (8X8X3)

View (Clear)

Pristal

Matrix

UPC Ctn UPC Each SKU# Style Size Ctn Qty Skid Qty

619284288020 619284088026 7902 Wave 8X8X3 10 300

619284268121 619284068127 7912 Wave 6X8X3 10 400

619284266226 619284066222 7922 Wave 6X6X3 10 480

619284248321 619284048327 7932 Wave 4X8X3 10 600

619284288822 619284088828 7902-EB Wave End Thin 8X8X3 10 300

619284288426 619284088422 9802 Wave 8X8X4 8 240

619284288938 619284088934 9802-AB Wave 90 angle 8X8X4 4 240

619284288945 619284088941 9802-EB Wave End Thick 8X8X4 8 240

619284279035 619284079031 7903 Pristal 8X8X3 10 300

619284279134 619284079130 7913 Pristal 6X8X3 10 400

619284279233 619284079239 7923 Pristal 6X6X3 10 480

619284279332 619284079338 7933 Pristal 4X8X3 10 600

619284298036 619284098032 9803 Pristal 8X8X4 8 240

619284298012 619284098018 9801 Quadra 8X8X4 8 240

619284298524 619284098520 9852 Ice 8X8X4 8 240

619284279004 619284079000 7900 View (Clear) 8X8X3 10 300

619284279103 619284079109 7910 View (Clear) 6X8X3 10 400

619284298005 619284098001 9800 View (Clear) 8X8X4 8 240

619284279042 619284079048 7904 Bubbles 8X8X3 10 300

619284279059 619284079055 7905 Ocean View 8X8X3 10 300

619284279219 619284079215 7921 Diamond 8X8X3 10 300

619284279530 619284079536 7953 Bromo 8X8X3 10 300

619284298081 619284098087 9808 Matrix 8X8X4 8 240

Product Order Index

Accessories:

Item Description

Panel Anchors

UPC Code #

107 02550 10001 4

40

20 Bundles

50

50

16

26

ABK-PA1

ABK-PR3

4Pallets 70 3,080 lb GBM-20

16 50 3 ABK-EX2

25

25

20

20

8

8

ABK-SO1

ABK-SO2

Panel Anchors 1 3/4”W X 24”LHot-Dipped Galvanized Steel

Hot-Dipped Galvanized SteelLadder 1 5/8”W X 48”L

1/4’ Spacer for Glass BlockThinline 3 1/8”

1/4’ Spacer for Glass BlockStandard 3 7/8”

Glass Block Latex ModifiedMortar Mix

(20 kg. per bag)

Expansion StripsWhite Closed-cell Polyfoam2 1/4”W X 24”L X 3/8” Thick

Steel Ladder

UPC Code #

1 07 02550 10009 0

1/4” Spacers

Thinline 3 1/8”UPC Code #

1 07 02550 31221 9

Standard 3 7/8”UPC Code #

1 07 02550 71221 7

Mortar Mix

UPC Code #

7-73727-0714-7

Expansion Strips

UPC Code #

107 02550 10103 5

DrawingNumber

of_____?

Units perWeightper car-ton (lb.)

SKU #

Glass Block Installation Gallery:

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