Interstitial Condensation Flat Roof

Over time this excess moisture can lead to the unseen decay in roof timbers and fixings.

Interstitial condensation flat roof.

2002 provides guidance on the principal forms of construction. Although this image is of a pitched roof both flat roofs and pitched roofs have warm and cold spaces. This type of roof has normally been used over small extensions to dwellings using timber joists and plywood deck. Condensation within a flat roof mainly occurs during cold weather when moisture vapour in the air which has been generated within the heated building rises from the room below into the cold roof void above the ceiling.

I d like to fit a downstairs loo in. We ve been talking to ian dryden business development manager at sig roofing about an increasing concern he has for flat roofs built in the 1980s and early 1990s and incorrectly refurbished roofs which appear to be leaking but they aren t. Interstitial condensation is a particular problem in cold deck roofs where the insulation is. Interstitial condensation can cause deterioration or even failure of the components of the assembly potentially shortening their useful lifespan.

Interstitial condensation is condensation which occurs between layers of the construction i e. Inside the roof wall or floor elements. They should be avoided therefore because interstitial condensation is likely and its effect on the structure and. For the control of condensation in roofs including cold deck roofs bs 5250.

A build up of interstitial condensation can affect all areas of a property through the penetration of walls floors ceilings and most specifically for this article the roof structure. This process sounds similar to that of surface condensation but the two do have their differences. Condensation in a cold roof. Because the waterproofing layer constitutes a vapour control layer on the cold side of the insulation there is a high risk of harmful interstitial and surface condensation on the underside of the deck or the upper surface of the.

Cold there s a small air vent in the room and an electric heater which hardly changes anything. Check it isn t interstitial condensation. Time and time again i see the wrong vaper control layer being used and installed incorrectly. Condensation can cause a number of problems within a building particularly interstitial condensation which can occur inside the roof s structure.

Your roof space should let stale warm air out and fresh cool air in. Interstitial condensation can happen if warm air from inside th.