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Roofing underlayment with nail sealing system

a technology of sealing system and roof, applied in the field of roofing underlayment, can solve problems such as the susceptibility to water leakage around the nail, and achieve the effect of avoiding water leakag

Inactive Publication Date: 2015-04-02
OWENS CORNING INTELLECTUAL CAPITAL LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a way to seal nailing areas in a roofing underlayment that create a tight seal around fasteners that pass through the sheet. This helps to prevent water from getting into the roof and causing leaks.

Problems solved by technology

This makes holes through the underlayment and there is a susceptibility to water leakage around the nails.
However, these systems require use of a full layer of the sealant, including across areas of the sheet where nailing will not occur.

Method used

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  • Roofing underlayment with nail sealing system
  • Roofing underlayment with nail sealing system
  • Roofing underlayment with nail sealing system

Examples

Experimental program
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Effect test

Embodiment Construction

[0010]Referring first to FIGS. 1 and 2, the roofing underlayment 10 comprises a base layer, namely a woven scrim layer 12, laminated to a first coating layer 14 on one side and to a second coating layer 16 on the opposite side.

[0011]The scrim comprises woven tapes which may be made of various resins, including polyolefins such as polyethylene and polypropylene, polyesters, polystyrene, nylon, and ethylene acrylic copolymers. The base layer may be a woven, non-woven or film layer. The coating layers are water impermeable and may comprise any of the same resins as the scrim. The scrim may have a weight of about 75 grams per square meter, alternatively a weight in the range of 25-150 gsm. The coatings may have a thickness of about 1.5 mil, alternatively a thickness in the range of 0.3-3.5 mil.

[0012]The sealant areas 18 are spaced-apart strips positioned between the scrim 12 and the first coating layer 14, which in use is the upper layer of the sheet. In the view of FIG. 1, the strips 1...

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Abstract

A sheet of roofing underlayment comprises a base layer, a water-impermeable coating layer laminated to one side of the base layer, and a plurality of spaced-apart sealant areas between the coating layer and the base layer, comprising a sealant adapted to form a seal around a fastener penetrating the sheet. The sealant area may be continuous or intermittent strips. The sealant forms a water-tight seal around the fasteners used to attach the roofing underlayment to a roof deck.

Description

FIELD OF THE INVENTION[0001]The invention pertains to roofing underlayments, and in particular to a system for preventing water leakage around fasteners that are used to secure roofing underlayment to a roof deck.BACKGROUND OF THE INVENTION[0002]The basic structure of a typical roofing underlayment is a woven scrim layer (or a non-woven layer) with a waterproof coating on both sides. In use, nails are driven through the roofing underlayment to attach it to a roof deck. This makes holes through the underlayment and there is a susceptibility to water leakage around the nails. It is known in the art to include in a multilayer roofing underlayment a layer that is adapted to seal around nails, e.g. Thai et al., US 2010 / 0178827; Binkley et al., US 2007 / 0077838; Zickell et al., US 2007 / 0071946; and Sandrasegaran et al., WO 2010 / 070466. However, these systems require use of a full layer of the sealant, including across areas of the sheet where nailing will not occur.SUMMARY OF THE INVENTION...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E04D12/00
CPCE04D12/002Y10T428/24802Y10T428/2481
Inventor VIDO, MARTINCHEEMA, HARJINDER S.
Owner OWENS CORNING INTELLECTUAL CAPITAL LLC