Lottes Roofing TPO Membrane

Thermoplastic, TPO, single ply roofing membrannes are among the fastest growing segment of the single ply roofing today. TPO has a broad range of positive characteristics enhancing it's position as a top of the line installation in industrial, commerical and residential roof installations. Our TPO is scrim fabric reinforced giving it the highest performance with superior shear strength and puncture resistance. As the continued demand for heat-reflective as well as energy efficient roofing systems are specified, TPO (thermoplastic polyolefin) continues to provide the highest resistance to ultraviolet, ozone and chemical exposures.

PART I GENERAL

1.1 SCOPE
A. Work of this section includes: Installation of the  TPO ROOF MEMBRANE SYSTEM and related items including flashing, insulation and vapor retarder (if required) in accordance with the project drawings and specifications.

B. Work in this section does not include: the furnishing or installation of equipment curbs, or other penetrations, nor does it include corrective work necessary to prepare the surface for the application of the system.

1.2 DESCRIPTION OF SYSTEM
Lottes Roofing TPO ROOF MEMBRANE SYSTEM: Shall be a complete system of compatible materials which will provide a watertight roof membrane. The membrane shall be fastened at the perimeter, expansion joints and large penetrations and shall be held in place by  BONDING ADHESIVE.

1.3 QUALITY ASSURANCE
A. Qualification of Supplier: The roof membrane shall be the Lottes Roofing TPO ROOFING MEMBRANE: a product of Lottes Roofing.

B. Qualification of Application: Work shall be completed by an applicator approved by Lottes Roofing.

C. Final Inspection: Upon completion of the project, the applicator shall notify Lottes Roofing by sending the Completion of Work Statement. 

D. Warranty:
    1. A  10, 15, or 20 Year Warranty covering the TPO deck sheet material is available. Full NDL warrantys are available only to Lottes RoofingCertified Gold Contractors.

1.4 SUBMITTALS
Applicator shall submit the Job Award Statement including all pertinent information to Lottes Roofing for review. Applicator shall notify the architect and Lottes Roofing of any deviations from the published details and specifications which must be approved in writing by Lottes Roofing.

1.5 PRODUCT HANDLING
A. Materials: Shall be handled and stored in a manner which will prevent their damage. Materials shall be stored in their original container and shall be clearly marked with the supplier name and product name. The loading of the storage area shall not exceed the allowable load for the structure.

B. Storage: The TPO Membrane is not affected by moisture or temperature variation, thus the storage shall be in a convenient area protected from damage by other trades. All other materials shall be stored in a protected dry area where the temperature shall be maintained between 60 degrees and 80 degrees F. If materials (excluding membrane) have been subjected to lower temperatures, restore to proper temperature before use.

1.6 JOB CONDITIONS
A. Weather: Work shall not proceed under conditions of inclement weather such as precipitation or high winds, or when such conditions appear imminent. In cold weather, adhesive shall be kept at room temperature until ready to use. Temperatures below 50 degrees F may require the use of a heat gun for installation of uncured Flashing.

B. All Surfaces: Shall be dry and free from dust and debris.

C. Solvented Material and Cleaners: Shall not be used near sparks or open flames. Areas where solvent based materials are used shall be properly ventilated to avoid concentration of vapors.

1.7 PROTECTION
A. Fire: All materials shall be protected against contact with extreme heat, sparks and open flames during storage and installation.

2.1 GENERAL
All elements of the Lottes Roofing TPO ROOFING SYSTEM shall be products of Lottes Roofing. Materials used in conjunction with the system which are not products of Lottes Roofing shall be approved in writing by Lottes Roofing.

2.2 LOTTES ROOFING TPO ROOFING SYSTEM

         A.  LOTTES ROOFING TPO MEMBRANE: Membrane shall meet the specifications listed for appropriate membrane, furnished in 10' wide sheets, 45 mil.

B. FLASHING: 45  or 60 mil TPO and 60 mil uncured Eternabond Flashing tape.

C. PRIMER ACTIVATOR: Furnished in 1 & 5 gallon pails.

D. SEAM SEALER: Furnished in 1/10 gallon cartridges.

E. BONDING ADHESIVE: Furnished in 5 gallon pails.

F. WATER CUT OFF MASTIC: In tubes and 1 gallon pails.

G. #10 ALUMINUM TERMINATION BARS: Prepunched 4 inches on center. 12 inches wide x 10 feet long.

H. CORROSION RESISTANT FASTENERS: Fastener type, length and depth of penetration to be determined from type of deck and insulation thickness and shall be subject to written approval of Lottes Roofing.

I. SEAM TAPE: 3 inch  uncured Butyl Tape or 2" Eternabond seam tape.


H. HEAT WELDED. In lieu of tape seams, lap joints and TPO flashing may be heat welded using the proper heat welding equipment and welding the lap joints and flashings at the correct tempreture to acquire a "full melt bond" between the 2 adjoining sheets. It is necessary to follow proper welding procedures and tempretures according to the manufacturer's recomendations for the welding devices being used.

PART III EXECUTION

3.1 INSPECTION OF SUBSTRATE
Prior to the start of the installation, the applicator shall examine all roof areas included in this specification. The applicator shall notify the general contractor of any unacceptable conditions. These include, but are not limited to, uneven deck surfaces, improperly installed curbs or nailers, surfaces with fins or sharp projections, and surfaces contaminated with incompatible materials. Work shall not begin until these conditions have been corrected.

3.2 INSTALLATION OF VAPOR RETARDER
Climatic conditions may require the use of a vapor retarder to prevent damage to the roof deck and insulation due to condensation. If required, the vapor retarder shall be installed according to the manufacturers recommendations and approved in advance by Lottes Roofing.

3.3 INSULATION ATTACHMENT
A. F-M APPROVED FOR CLASS I CONSTRUCTIONS (without sprinklers)
(1) Mechanically fastened to steel, fire treated wood or plywood decks
     A. Composite Board of Isocyanurate: Root decks shall be insulated with composite board, F-M approved isocyanurate with felt facing inches thick. Butt insulation tightly and fasten to deck with #12 corrosion resistant fasteners of sufficient length and in a pattern to meet wind uplift requirements.
     B. Tapered or Flat EPS: Roof decks shall be insulated with flat or tapered EPS insulation. Lay the EPS insulation onto the deck with all joints butted tightly. Lay wood fiberboard over the EPS with all joints butted tightly. Fasten entire assembly to the deck with #12 corrosion resistant fasteners of sufficient length and in a pattern to meet wind uplift requirements.
(2) Mechanically Fastened to Concrete Decks *
     A. Tapered and Flat EPS insulation: Loosely lay the tapered or flat EPS insulation onto the concrete deck. Loosely lay fiberboard over the EPS, butt all joints tightly and fasten with corrosion resistant screw type of gripcon fasteners of sufficient length and in a pattern to meet wind uplift requirements.
(3) Mechanically fastened to L. W Concrete, Poured Gypsum and Cementitious Decks *
     A. Tapered or Flat EPS Insulation: Roof decks shall be insulated with flat or tapered EPS insulation. Loosely lay insulation onto the deck. Loosely lay fiberboard over the EPS. Butt all joints tightly. Fasten entire assembly through the deck with toggle bolt assemblies and plates at the rate of 1 per 4 sq. ft.
(4) Asphalt Adhered to Steel Decks*
     A. Tapered or Flat EPS Insulation: Steel decks shall be covered with one layer of insulation board with all joints buffed tightly and adhered to the deck. The EPS insulation shall be attached to the deck with 25 lb. mopping per 100 sq. ft. of Type I asphalt.
(5) Asphalt Adhered to Fire Treated Wood and Plywood Decks *
     A. Tapered or Flat EPS Insulation: Decks shall be covered with one layer of insulation board and the EPS shall be adhered to the deck in a 25 lb. mopping per 100 sq. ft. of Type I asphalt.
(6) Asphalt Adhered to Concrete Decks *
     A. Tapered or Flat EPS Insulation: Roof decks shall be insulated with flat or tapered EPS insulation. Fully mop the primed concrete deck with Type I asphalt at the rate of 25 lbs. per 100 sq. ft. Allow the asphalt to cool to 225 to 250 degrees F and imbed the EPS, butting all joints tightly and walk each piece in.
(7) Asphalt Adhered to Lightweight Concrete, Gypsum and Cementitiuous Decks*
     A. Tapered or Flat EPS Insulation: Deck shall be covered with one ply of 43 lb. coated base sheet with sides lapped 4" and ends lapped 6". Fasten with appropriate fasteners 9 inches on center along with laps and stagger nails at 18 inches on center over the entire surface. The EPS shall be fastened to the coated base sheet in a 25 lb. per 100 sq. ft. mopping of Type I asphalt. Allow the asphalt to cool to 225 to 250 degrees F, imbed the EPS insulation into the asphalt and walk each piece in.

COMPLETE EACH OF THE ABOVE ASPHALT ADHERED SPECIFICATIONS WITH THE FOLLOWING:
Back mop 1/2 inch fiberboard with Type I asphalt at the rate of 25 lbs. per 100 sq. ft. Allow the asphalt to cool to 200 to 225 degrees F and flop onto the EPS with all joints breaking with the joints of the EPS insulation at least 6 inches. Butt all joints tightly and walk each piece in.

* This portion of the Guide specification covers the application of EPS insulation only. Consult chart on pages 7 and 8 which lists the other acceptable insulations for this method of attachment. See attachment notes and compose your specification from the information furnished.

3.4 INSTALLATION OF TPO MEMBRANE

The TPO membrane may be installed in a fully adhered application directly over 1/2" or larger plywood decking without insulation, if the deck support is considered adequate for the roof load as determined by the local installer, and the roof installation meets local building codes.  

Position the TPO membrane over the substrate, wood decking, concrete, or insulation, without stretching the sheet. Allow sufficient materials for perimeter attachment. When the new membrane is to be sealed to an abutting membrane, overlap the edge of the new membrane 5” onto the "in place" membrane.

Bond the new sheet to the substrate by folding the sheet lengthwise on to itself so that one half of the underside is exposed. Smooth out all the wrinkles and buckles along the folded edge. Apply the bonding adhesive evenly at the rate of 120 sq. ft. per gallon per surface using a 9" plastic core paint core paint roller or approved spray application equipment. Allow the adhesive to dry until it is tacky and string free to the touch. Roll the membrane onto the substrate taking care to avoid wrinkling by using a "wave" air motion at the leading edge to "roll" the sheet into place. Bond the adhered half of the membrane with a 18" to 24" heavy duty push broom using a pushing motion to achieve maximum contact. Pull back the unbonded half of the sheet and repeat this procedure. Do not apply adhesive to the top surface of any abutting membrane that is to be used as the seam joint.

Contact surfaces for the SEAMING TAPE shall be cleaned to remove construction dirt using a light application of unleaded gas on a clean, lint-free rag. After cleaning apply Anjon primer to surfaces before applying seam tape.

The SEAMING TAPE shall be securely bonded to the bottom deck sheet along the previously mark proper edge alignment of the seam tape on the bottom sheet. The top sheet shall then be lapped onto the lower sheet. The release paper shall be carefully removed without disturbing the placement of either sheet.

The lap joint shall be "walked in" to fix placement and thoroughly rolled with a 2" metal roller in the direction perpendicular to the length of the joint.

C.HEAT WELDED. In lieu of tape seams, lap joints and TPO flashing may be heat welded using the proper heat welding equipment and welding the lap joints and flashings at the correct tempreture to acquire a "full melt bond" between the 2 adjoining sheets at least 2" minimum weld. It is necessary to follow proper welding procedures and tempretures according to the manufacturer's recomendations for the welding devices being used.

3.6 MECHANICAL ATTACHMENT
The membrane shall be secured to the roof deck at the perimeter, large penetrations and the expansion joints.

3.7 FLASHING
A. Flashing: Shall comply with details published by Lottes Roofing. Any deviation from details published by Lottes Roofing is subject to the written approval of Lottes Roofing. Side wall and Unit Curb Flashing shall extend a minimum 4" above the roof deck. Flashing configurations which require field forming shall be flashed using Anjon approved Flashings.

All areas of installed membrane shall be sealed at the end of each workday to assure against moisture infiltration beneath completed areas. Methods for temporary seal are at the applicators option with Lottes Roofing approval.

3.9 CLEANING
Applicators shall remove all debris related to this work from the jobsite.