Separation Board In Roofing

The rafters on the rear side of a steeply pitched roof were separating from the ridge board.

Separation board in roofing.

I can see 1 4 to 1 2 inch gap between the ridge board and rafters. Component type b cover board single ply refer to the safe for use instructions and product label prior to using this product. The gap formation between rafter and ridge board appear to be due to improperly cut length of rafter right from beginning. This prevents the wood from splitting.

A cover board provides separation between a roof cover and insulation that may not be compatible or the attachment adhesive of the roof membrane is not compatible with the insulation. Shown to withstand delamination deterioration warping and jobsite damage more effectively than other roofing membrane substrates such as paper faced gypsum board fiber board and perlite insulation. In addition national roofing contractors association nrca has issued bulletins over the years recommending the use of cover boards to minimize damage to polyiso insulation caused by high foot traffic and other impacts. The key is to pre drill your holes with a cordless power driver and a wood bit.

Numerous studies show the value of cover boards in enhancing a roof cover s ability to resist damage by hail. Separation sheets fire sheets vapor barriers ib offers a selection of separation sheets fire sheets and vapor barriers for a variety of applications. To prevent blistering with built up roof membranes bur and to provide a separation layer and flat surface in re cover situations. High r value 2 8 r.

Jm 3 oz polyester slipsheet is intended for use as a separation layer between an existing roof system and a new single ply recover system. Also use some wood glue between the soffit and fascia for a stronger hold. Insulation cover board ib single ply roof systems are tested and approved over rigid thermal roof insulations recover boards. Benefits of densdeck roof board include.

Separator board has more than two times the r value of wood fiber or gypsum boards. Align the insulation boards with the chalk lines and lay them onto the deck. On some of rafters the bent nails are also visible through the gap. Cover boards have historically had two uses.

An excellent fire barrier densdeck roof boards feature a noncombustible core and inorganic surface that offer greater fire protection than other conventional commercial roofing products when applied over combustible roof decks and steel decks. Butt the ends of the boards up together. The top portion of the rater was still in contact but by the bottom of the edge where the rafter abuts the ridge board a full one inch gap was present. I noticed that some of the rafters of my home are not joined properly to the ridge board beam.

Use a chalk box to snap chalk lines on the roof deck.