Residential Flat Roof Insulation

The type that is right for your flat roof insulation job depends upon the state of the roof expert opinion on the best type and your budget.

Residential flat roof insulation.

Better to have 3 or more. These products provide a high r value inch excellent sound attenuation characteristics and outstanding fire performance. Flat roofs usually come with a 10 to 20 year warranty but can last 25 years if you build the roofs right and maintain them using commonsense rules. Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board.

Thermafiber residential mineral wool blankets are ideal for insulating walls floor ceilings and attic spaces in homes. Different types of roofing insulation exist including blanket insulation blown insulation and rigid insulation. Rockwool products are available with a bitumen or mineral coated fiberglass face to be used in a number of roofing solutions. That accounts for its materials membrane insulation and decking as well as snow and rainfall and even for equipment like an air conditioner.

Since your attic is insulated i would advise at least 2 of polyiso insulation in the roof for good measure. From there the flat roof system you choose will determine the materials you apply. In fact it may cause damage in the long term. As for insulation thickness it depends on how much you can afford.

The target should be to achieve a u value of 0 25w m2k or better. The typical u value of an existing uninsulated flat roof is 1 5w m2k. To achieve this add 100 to 160mm of insulation above the structural deck dependant upon insulant conductivity. Recommended roof insulation r value is 38 r but ideal is to have 50 r or more.

Products are also inorganic non combustible and mold resistant. Can a flat roof be insulated from inside from the ceiling of the area below. Rockwool stone wool roof insulation combines the thermal performance dimensional stability impact resistance and acoustic control required to increase the performance of many flat roof assemblies. Insulating a roof from inside is technically feasible.

It s what s called the cold roof principle.