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Built-Up Roofing - Technical Information

 

 

This section will help to provide a little bit of technical information.

The following table shows application temperatures for asphalt and coal tar bitumens. These are not kettle temperatures, they are temperatures that the bitumen should be at the roof level. These temperatures were obtained from various bitumen manufacturers.

ASPHALT – ASTM D 312

Asphalt Type

Mop Application ( F)

Mechanical Spreader Application ( F)

Type I Dead Level

350 25

375 25

Type II Flat

400 25

425 25

Type III Steep

425 25

450 25

Type IV Special Steep

450 25

475 25

Type I asphalt can be used on roofs with slopes up to in 12.
Type II asphalt can be used on roofs with slopes up to 1 in 12.
Type III asphalt can be used on roofs with slopes up to 3 in 12.
Type IV asphalt can be used on roofs with slopes up to 6 in 12.

For a quick look at how to figure the "slope," click here.

COAL TAR – ASTM D 450

Coal Tar Type

Mop Application ( F)

Mechanical Spreader Application ( F)

Type I Pitch

360 25

380 25

Type III Bitumen

375 25

400 25

Type I coal tar pitch can be used on roofs with slopes up to 1/8 in 12.
Type III coal tar bitumen can be used on roofs with slopes up to in 12.

What follows are ASTM specifications for certain Built-Up Roofing materials. For information on how to obtain a written copy of these specifications or other specification and test procedures, visit the ASTM web site at www.astm.org.

BITUMENS AND LAP CEMENT

Asphalt – Types I, II, III, and IV

ASTM D 312

Coal Tar – Types I, II, and III *

ASTM D 450

Lap Cement – A.K.A. Cold-Applied Liquid Adhesive, A.K.A. Solvent Based (Cutback ) Asphalt – Type I (Grades 1 and 2), and Types II and III

ASTM D 3019

* Coal Tar types I and III are used in roofing and generally are referred to as Coal Tar Pitch and Coal Tar Bitumen, respectively. Type II is generally used in dampproofing and waterproofing and is not used with built-up roof systems.

FELTS AND FABRICS

Asphalt-Coated Organic Base Sheet – Perforated and Non-Perforated

ASTM D 2626

Asphalt-Coated Glass Fiber Base Sheet

ASTM D 4601

Asphalt-Coated Glass Fiber Venting Base Sheet, Types I and II

ASTM D 4897

Asphalt-Saturated Organic Felt – Types I (A.K.A. No. 15) and II (A.K.A. No. 30)

ASTM D 226

Coal Tar-Saturated Organic Felt

ASTM D 227

Smooth-Surfaced Asphalt Roll Roofing – Types I, II, III, and IV

ASTM D 224

Asphalt- or Coal Tar-Saturated Cotton Fabrics

ASTM D 173

Asphalt- or Coal Tar-Saturated Woven Burlap Fabrics

ASTM D 1327

Asphalt-Impregnated Glass Felt – Types III, IV, and VI

ASTM D 2178

Coal Tar-Impregnated Glass Felt – Type I

ASTM D 4990

Thermoplastic Fabrics for Cold-Applied Built-Up Roofing – Types I, II, III, IV, V, and VI

ASTM D 5665

Thermoplastic Fabrics for Hot-Applied Built-Up Roofing – Types I, II, III, and IV

ASTM D 5726

Asphalt Primer

ASTM D 41

SURFACINGS (AGGREGATE, COATINGS, AND CAP SHEETS)

Coal Tar Primer

ASTM D 43

Mineral Aggregate – Gravel or Slag

ASTM D 1863

Asphalt Roof Coatings – Asbestos Free

ASTM D 4479

Asphalt Roof Coatings

ASTM D 2823

Aluminum-Pigmented Asphalt Roof Coatings – Non-Fibered, Asbestos Fibered, and Fibered without Asbestos

ASTM D 2824

Emulsified Asphalt – Fibered and Non-Fibered

ASTM D 1227

Mineral-Surfaced Asphalt Roll Roofing (Glass Fiber)

ASTM D 3909

Mineral-Surfaced Asphalt Roll Roofing (Organic)

ASTM D 249

Mineral-Surfaced Asphalt Roll Roofing (Organic) – Wide Selvage

ASTM D 371

Mineral-Surfaced Asphalt Roll Roofing (Glass Felt)

ASTM D 2178

ROOF CEMENTS

Asphalt Roof Cement – Asbestos Free

ASTM D 4586

Asphalt Roof Cement

ASTM D 2822

Coal Tar Roof Cement – Asbestos Free

ASTM D 5643

Coal Tar Roof Cement

ASTM D 4022

PRIMERS

Asphalt Primer

ASTM D 41

Coal Tar Primer

ASTM D 43

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