Residential Flat Roof Insulation

Different types of roofing insulation exist including blanket insulation blown insulation and rigid insulation.

Residential flat roof insulation. The typical u value of an existing uninsulated flat roof is 1 5w m2k. As for insulation thickness it depends on how much you can afford. To achieve this add 100 to 160mm of insulation above the structural deck dependant upon insulant conductivity. Better to have 3 or more.

Products are also inorganic non combustible and mold resistant. It s what s called the cold roof principle. Insulating a roof from inside is technically feasible. These products provide a high r value inch excellent sound attenuation characteristics and outstanding fire performance.

This system was often used in the past but is not recommended nowadays. From there the flat roof system you choose will determine the materials you apply. With a flat roof however this becomes a major concern. The target should be to achieve a u value of 0 25w m2k or better.

Rockwool products are available with a bitumen or mineral coated fiberglass face to be used in a number of roofing solutions. Pros and cons for flat roof materials all three types of flat roofing cost 250 to 350 per square 100 square feet but prices vary according to region and size of the roof. That accounts for its materials membrane insulation and decking as well as snow and rainfall and even for equipment like an air conditioner. 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. Recommended roof insulation r value is 38 r but ideal is to have 50 r or more. 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. Thermafiber residential mineral wool blankets are ideal for insulating walls floor ceilings and attic spaces in homes.

Can a flat roof be insulated from inside from the ceiling of the area below.