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Asphalt Analysis
An asphalt analysis shall be based upon an examination of a 4" x 40" rectangular test cut specimen in accordance with ASTM D 3617. The contractor shall cut the test specimen and adhere it back into place as well as adhere additional sheets equal to the quantity specified over the replaced test cut. The specimen test cut shall be examined for voids, and if any voids are detected they shall be checked against the following criteria:

1. Overlapping voids between two or more sheets are unacceptable.

2. The maximum acceptable length of any single void encapsulated in asphalt is 2".

3. The total length of all voids encapsulated in asphalt shall be less than 4" between any two sheets.

4. Dry voids, the absence of asphalt between sheets, are unacceptable.

5. Voids continuous through the specimen are unacceptable.

6. Interply moisture in voids is unacceptable.

7. Sheet shall not touch sheet in any location.

Shall examination indicate a lack of the correct quantity of asphalt, additional ASTM D 3617 test cuts shall be made at four locations diagonally, 10 feet in each direction from the original test cut. Repeat the test cuts until the deficiency no longer exists, and install the specified sheets and asphalt over the affected area.

Roof System Membrane Construction
The strength of the roof system membrane is dependent on the type, quantity, lapping, and overall layer construction of the reinforcing sheets. The correct side laps, end laps, and head laps must be maintained. Side lap is the overlap distance along the length of a reinforcing sheet where one sheet overlaps the adjacent sheet. End lap is the overlap distance that is measured from where one sheet ends and where another sheet begins. Head lap is the distance of the overlap between the lowermost and the uppermost ply sheets of the shingled roof membrane when measured perpendicular to the long dimension of the roof membrane . See Illustration 1.

Daily Installation: The installation of all reinforcing sheets started during the day shall be completed in the same day including the reflective surfacing or an asphalt glaze coating. Phased installation is prohibited. The reflective surfacing may be delayed for up to six months.

Install M60 RubrPoly Reinforcing Sheets to Construct Flashing Membranes
A cant shall be installed at the base of vertical transitions such as walls or penetrations to provide a transition for the roof system membrane. The RubrPoly flashing sheets shall extend the specified distance from the surface of the horizontal roof, over the cant, and the specified distance up the vertical surface of the wall or curb. A counterflashing is required to be installed so as to waterproof and protect the top of the flashing and roof membrane sheets.

Flashings: Flashing membranes shall be completed on a daily basis. Non-asphalt surfaces such as concrete and metal surfaces that come into contact with asphalt roof system components shall first be primed with M400 RubrPrime, and the primer shall be allowed to dry prior to further installations. Metal wall or curb caps and counterflashings shall be secured with M300 RubrMastic and mechanical fasteners per the "Roof Flashing Details" section. No condition shall be allowed that would permit moisture entering behind, around, or under the flashing and roof membrane sheets. Temporary flashing installations shall be monitored daily for lap openings and voids that may allow moisture to enter.

   


The Reflective Surfacing

All Fields roof systems require a reflective surfacing designed to shield the roof system from climate conditions while also providing various degrees of resistance to fire, and physical wear. These reflective surfacings include the following categories: (1) Reflective Coatings; (2) Reflective Minerals; and (3) Reflective Cap Sheets. The reflective surfacing shall be applied according to the "Roof System Construction" section. Surface preparation and set up time may be required prior to the installation of certain reflective surfacings. Refer to the "Coating Rate Chart" for additional information.

One of the Following Fields Reflective Surfacings shall be applied
A. Reflective Coatings
1. M800 RubrStar
- Reflective SEBS Asphalt
2. M600 FireBloc - ModBit Fibered SEBS Aluminum
3. F600 FlameBloc - ModBit Fibered Aluminum
4. M630 SilvrShield3 - 3.0 lb Fibered SEBS Aluminum
5. F630 SolrShield3 - 3.0 lb Fibered Aluminum
6. F640 SolrShield2 - 2.0 lb Fibered Aluminum
7. M850 PolrShield - Premium Elastomeric White

B. Reflective Minerals
1. RMAC SilvrStars
- Aluminum Chips
2. RMCG PolrWhite - Ceramic Granules
3. RMPG PeaGravl - Washed .25" Pea Gravel

C. Reflective Cap Sheets
1. M69 Poly RubrCap
- SEBS White Poly Cap Sheet
2. F59 PolyCap - White Poly Cap Sheet
3. M68 Glass RubrCap - SEBS White Glass Cap Sheet
4. F58 GlasCap - White Glass Cap Sheet

Fields reserves the right to modify, add, or delete any requirement(s) at any time. Requirement change(s) must be in writing and signed by the Fields Roof Systems Technical Manager.

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Fields Company LLC
2240 Taylor Way,
Tacoma WA 98421

Phone:
800-627-4098
Fax:
253-383-2181
email:
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