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The following guidelines are provided to insure proper installation of Boral TileSeal® 50, however local building codes may differ so please consult with the local building department for any different or additional installation requirements.

There are three different sections of these installation guidelines depending on the climate and whether or not a base sheet is required.

GENERAL GUIDELINES FOR ALL INSTALLATIONS

The deck must be clean, dry, free from loose contaminants, and structurally sound. Boral TileSeal 50 should be installed when ambient and substrate temperatures are 40F (4.4C) or higher. Do not use Boral TileSeal 50 on roof pitches of less than 2:12 (17%). For tile applications, do not use Boral TileSeal 50 below a 2½:12 (21% slope). Water must be allowed to drain freely from all areas of the roof.

Important for tile installations! Loading boards or battens are required to facilitate roof loading for concrete and clay roof tile installations when using Boral TileSeal 50. Boral’s Elevated Batten System® must be used for concrete and clay roof tile installations on roof slopes below 4:12 (33% slope). If loading boards are used, seal all penetrations from loading board fasteners once loading boards are removed.

When using tile fasteners with Boral TileSeal 50, the use of modified mastic is optional because Boral TileSeal 50 is a self-sealing underlayment based on testing performed pursuant to ASTM D 1970.

When installing higher profile tiles with a closed tile valley detail, it may be necessary to consider the potential exposure of the Boral TileSeal 50 underlayment in regions where the valley metal is installed first. While it may take extended time periods for the surface mat to show any signs of degradation due to partial exposure to UV rays, it should be noted that in most cases where a double weave of the valley has been used, there will still be plenty of protection from the SBS modified base material. In the interests of good roofing practice, a narrow strip of an approved granular surface modified type cap sheet may be applied in the valley center prior to the tile installation.

Some codes require an additional base sheet under Boral TileSeal 50. Check your local building codes.

HURRICANE ZONES – WHERE A BASE SHEET IS REQUIRED Apply the base sheet parallel to and abutting the eave. Side laps should be minimum 6” and head laps minimum 4”. Mechanically fasten the base sheet to the deck with approved nails, staples, cap nails or tin tags, maximum 6” on center at the laps and two staggered rows maximum 12” on center in the field. Cover entire roof with the base sheet. Apply the metal drip edge and other flashings over the base sheet. Coat entire metal surface of deck flange with asphalt primer.

Apply Boral TileSeal 50 to the roof, starting at the eave. The first course of Boral TileSeal 50 should be parallel and flush to the edge of the eave. Fasten the top of each sheet to the deck through the black selvage lap maximum 12” on center with approved fasteners. Apply each succeeding course of Boral TileSeal 50, lapping the entire width of black selvage area.

Apply SBS mastic under all side or any other laps onto the top white surface of Boral TileSeal 50. (Pic. 1) All side laps must be minimum 6”. Use a roller like the one shown below to insure complete adhesion to the base sheet. (Pic. 2)

Note: Boral TileSeal 50 is not approved for adhesive set tile applications.

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NON-HURRICANE ZONES – WHERE A BASE SHEET IS REQUIRED Apply the base sheet parallel to and abutting the eave. Side laps should be minimum 6” and head laps minimum 2”. Mechanically fasten the base sheet to the deck with approved nails, staples, cap nails or tin tags, maximum 6” on center at the laps and two staggered rows maximum 12” on center in the field. Cover entire roof with the base sheet. Apply the metal drip edge and other flashings over the base sheet. Coat entire metal surface of deck flange with asphalt primer.

INSTALLATION INSTRUCTIONS

Boral TileSeal® 50HT

INSTALLATION GUIDE

Boral Roofing Build something great™

Boral TileSeal® 50 Installation Guide

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Apply Boral TileSeal® 50 to the roof, starting at the eave. The first course of Boral TileSeal 50 should be parallel and flush to the edge of the eave. Fasten the top of each sheet to the deck through the black selvage lap maximum 12” on center with approved fasteners. Apply each succeeding course of Boral TileSeal 50, lapping the entire width of black selvage area. Apply SBS mastic under all side or any other laps onto the top white surface of Boral TileSeal 50. (Pic. 1) All side laps must be minimum 6”. Use a roller like the one shown above to insure complete adhesion to the base sheet. (Pic. 2)

Note: Boral TileSeal 50 is not approved for adhesive set tile applications.

NON-HURRICANE ZONES - WHERE A BASE SHEET IS NOT REQUIRED Plywood is the recommended substrate for direct deck installations. If an additional sheet is not used under Boral TileSeal 50, place the metal drip edge and other flashings directly on the deck, use a separator/slip sheet between metal and deck where required by code, and coat the roof flange as described above. Install Boral TileSeal 50 in all valleys by either weaving or by first applying a strip down the length of the valleys as shown below. When weaving the underlayment in the valleys, the upper edge of the underlayment must be at least 12” past the center of the valley. Apply Boral TileSeal 50 to the roof, starting at the eave. The first course of Boral TileSeal 50 should be parallel and flush to the edge of the eave. Use a roller like the one shown in Pic. 2 to insure complete adhesion to the roof deck. Fasten the black selvage area at the top of the sheet, as shown in Pic. 3 at 24” on center for slopes below 7:12 and at 12” on center for slopes 7:12 and above. Apply each succeeding course of Boral TileSeal 50, lapping the entire width of black selvage area. It is necessary to provide a seal at all end laps using SBS mastic 6” min all end laps or use the following alternative methods:

1. T h e f i r s t i s t o a p p l y a n SBS modi f i e d m a s t i c u n d e r a l l s i d e or o t h e r l a p s a n d o n t o t h e t o p w h i t e s u r f a c e of Boral T i l eSe a l 50 t o e n s u r e a c o m p l e t e l y w a t e r t i g h t s e a l . ( Pic. 1) A l l l a p s m u s t be minimum 6”.

2. The second is a Joined and Folded Seam, accomplished by applying a solid bead of roofing adhesive along the entire length of the seam, then joining the sheets by facing the ends of the adjoining sheets together and folding them over at the seam.

3. The third is an Inverted Sheet Seam, made by adhering the ends onto an inverted sheet that has been fastened to the roof deck. See the adjoining pictures.

Valley Option 1

ROOF DECK

UNDERLAYMENT WOVEN TO EXTEND THROUGH VALLEY LINE A MINIMUM OF 12”

SINGLE LAYER FELT

Valley Option 2

ROOF DECK

ROOF DECK

VALLEY FLASHING

UNDERLAYMENT TO LAP OVER VALLEY METAL A MINIMUM OF 2”

VALLEY FLASHING (EXTEND ENTIRE WIDTH OF VALLEY METAL BEYOUND ROOF DECK)

OPTIONAL: SELF-ADHERING POLYMER MODIFIED ASPHALT MEMBRANE ON EACH SIDE TO COVER FLASHING FLANGE

CUT TOP CORNER OF UNDERLAYMENT TO INSURE PROPER DIVERSION OF WATER INTO THE VALLEY METAL

36” SWEAT/BLEEDER SHEET

ROOF UNDERLAYMENT

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Boral TileSeal® 50 Installation Guide

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JOINED AND FOLDED SEAM

The ends of each sheet should be positioned and aligned to form a minimum 2” interface that can be pressed together to form a solid bond between the two sheets. (Pic. 4)

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The seam is then folded flat to either side. (Pic. 5)Battens may then be installed as usual. (Pic. 6)

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The added thickness of this seam will only slightly elevate the batten and will not be sufficient to create a noticeable change in the installed tile. (Pic. 7)

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Lapped Seam

Lapped Seam

Metal Straight Edge

Tiles sit evenly

INVERTED SHEET SEAM (not allowed in Hurricane Zones)

Cut a 12” strip of Boral TileSeal® 50 and invert (flip over) on the roof deck in a position that half will be under the end of the adjoining sheets. Tack the strip into place before setting the sheets. (Pic. 8)

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Lap the adjoining sheets onto the inverted strip and press the sheets together to form a solid bond. Roll the seams with a seam roller to assure complete adhesion. (Pic. 9)

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Completed Inverted Sheet Seam (Pic. 10)

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These guidelines are povided for the installation of Boral TileSeal 50, however local building codes may differ, so please consult with the local building department for any different or additional installation requirements.

Boral TileSeal™ HT© 2016 Boral Roofing LLC Rev-6/161.800.669.TILE (8453) | www.BoralRoofComponents.com