What Insulation To Use On A Flat Roof

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.

What insulation to use on a flat roof.

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. Flat roof hello there s a lot of good material in this post for comment. What is polyiso insulation. How to improve insulation levels of flat roofs rigid foam.

Gropius and le corbusier in the 20s sought to capture the machine age by using industrial style roofs. While expensive the best insulation is polyiso rigid foam. It should be of the maximum available thickness. Call in a specialist contractor to do the work.

Materials used to make insulation in these three types include mineral wool fiberglass cellulose fiber vermiculite styrofoam polystyrene and polyurethane. If you re unsure which material would best suit your flat roof project always consult an insulation or roofing professional for advice. Roofing professionals emphasize that the choice of flat roof insulation should feature the appropriate r value. The most expensive and highly recommended insulation is polyisocyanurate polyiso rigid foam.

Install composite insulation made from expanded polystyrene or eps foam laminated with a. The material that works best depends largely upon preference in a given situation. So you see insulating from outside using a hot roof system is the best option. We must not forget about the fact that the conditions for using insulation on a flat roof are radically different from all other insulation systems.

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. The best long term solution. Extruded polystyrene xps is also an optimal choice along with expanded polystyrene eps. You can expect to pay about 55 100 sq ft.

For a 1 inch board equivalent of 6 r value. We recommend having at least 20 r value worth of material for optimal energy efficiency. For flat roofs we suggest the use of insulation upstands to prevent thermal bridging. These are small sections of insulation which are positioned vertically around the edges of some constructions of flat roofs.

Let me just mention that the flat roof as a motif certainly predates 1933. Like other roofs insulating a flat one requires ample ventilation a vapor barrier and sealed bypasses. The typical u value of an existing uninsulated flat roof is 1 5w m2k. Use rigid foam insulation panels on your flat roof before applying the final roof covering or inside the.