Roof Substrate Vs Decking

That said it is nonetheless still one more layer of protection and stability for a roof and an incredibly important part of the roofing.

Roof substrate vs decking.

There are many different types available including options for green roofs and fsc sustainably sourced and produced types. But many roofers believe that it is not as strong as plywood and in particular does not have equal nail holding. A roof deck is a roofing material layer installed on top of the rafters and right under the insulating layers of underlayment. Roofs over concrete decks should always have a vapor barrier installed.

The primary function of a deck is to act as a unifying structural diaphragm by tying all the components of a roof together. A solid deck substrate may consist of panels solid sheets or closely spaced deck members made of wood metal or composite materials to which the roof membrane is applied. The third installment in my series on the roof system is about the substrate board. Roof substrates otherwise known as roof decking or rigid sarking support other roof elements such as vapour control layers insulation and roof finishes.

But in recent decades the asphalt composite shingle has taken off as the main roofing style. Since roof decking tends to be made from wood and wood can rot when mixed with moisture and heat after being laid this layer of defense should be protected quite quickly with waterproofing membranes. The solid substrate for fluted metal decks is typically a gypsum underlayment and the concrete is the solid substrate for concrete decks. A roofing contractor must ensure that a deck s surface condition is suitable for application of new roofing materials including shingles.

Plank decking in older homes plank decking may have been used for the roof decking substrate. Solid decking should be used with non structural style panels such as mbci s craftsman series small batten panels. Before applying new roofing materials the deck should be inspected to determine that it is smooth straight and free of irregularities such as. It comes in 4 by 8 foot panels as does plywood and is commonly used interchangeably with plywood such as for roof decking.

It is a little cheaper than plywood which is why it is popular on housing tracts as a cost saving measure. Chapter four of the reroofing section labelled roof decks for reroofing provides that a deck as part of a roof assembly needs to provide structural support and be the substrate for the roof assembly. Typically plank decking material is either 1 x6 or 1 x8 lumber. Again if this type of decking is discovered during the tear off of the roof shingles a thorough inspection must be made to make sure that it is in good overall condition and that the gaps between the individual boards does not exceed to.

Cedar shakes have always been a popular roofing material especially in the pacific northwest.