What Insulation To Use On A Flat Roof

Materials used to make insulation in these three types include mineral wool fiberglass cellulose fiber vermiculite styrofoam polystyrene and polyurethane.

What insulation to use on a flat roof.

The chosen insulation laid on top of this should be able to take the weight of anything put above it on the roof without compression or protected from compression by further sheeting. These are small sections of insulation which are positioned vertically around the edges of some constructions of flat roofs. The best long term solution. The main reason for using these when insulating a roof is to prevent cold bridging at the junction between the roof and the exterior walls.

Like other roofs insulating a flat one requires ample ventilation a vapor barrier and sealed bypasses. For flat roofs we suggest the use of insulation upstands to prevent thermal bridging. The most expensive and highly recommended insulation is polyisocyanurate polyiso rigid foam. Let me just mention that the flat roof as a motif certainly predates 1933.

Extruded polystyrene xps is also an optimal choice along with expanded polystyrene eps. It is top quality and the most cost effective product for your flat roof. Flat roof insulation thickness. It should be of the maximum available thickness.

For a 1 inch board equivalent of 6 r value. If you re unsure which material would best suit your flat roof project always consult an insulation or roofing professional for advice. The typical u value of an existing uninsulated flat roof is 1 5w m2k. The material that works best depends largely upon preference in a given situation.

Use rigid foam insulation panels on your flat roof before applying the final roof covering or inside the. What is polyiso insulation. Crushed glass is heated after being placed into a mould and can be bought in flat or tapered blocks for use in insulation on flat roofs. How to improve insulation levels of flat roofs rigid foam.

While expensive the best insulation is polyiso rigid foam. You can expect to pay about 55 100 sq ft. Gropius and le corbusier in the 20s sought to capture the machine age by using industrial style roofs. So you see insulating from outside using a hot roof system is the best option.

Call in a specialist contractor to do the work. If in general the insulation be it mineral wool or polystyrene remains locked in a protected layer and completely immobilized then on the roof in use the effect of dynamic loads is very. Roofing professionals emphasize that the choice of flat roof insulation should feature the appropriate r value. Install composite insulation made from expanded polystyrene or eps foam laminated with a.