Using Styrofoam For Flat Ceiling Roof Insulation

In that situation the foam would be sprayed directly to the backside of the roof sheathing resulting in an un vented roof.

Using styrofoam for flat ceiling roof insulation.

Cold roof a very bad idea. One common use of extruded polystyrene foam board is for foundation insulation panels. Flat roof insulation installation the rigid foam board insulation we used was 2 thick and came in 4 x 8 sheets. Some products have reinforced facing to make them sturdier.

Closed cell polyurethane spray foam will prove ideal for thermal insulation of a flat roof. Looking upward through the open ceiling if the exterior wall and roof deck assemblies both contain spray foam then a continuous insulation and airtight layer is established from the base of the walls to the peak of the roof. Roofing insulation is one of the most important and misunderstood building components. Here we share the most common mistakes people make when installing flat roofing insulation.

To produce a hot roof rigid insulation is fitted outside above the weatherproofing. Also called styrofoam insulation this is the least expensive material. A very energy efficient enclosure results. This foam board insulation is available with straight or tongue and groove edges to help limit air movement.

Image courtesy of d7 spray foam insulation houston tx. This is by far the most expensive option. It provides about r 5 per inch. Cold roof systems are highly inadvisable as insulation from the inside will inevitably lead to the formation of condensation.

This is then covered with a further weatherproofing layer. It is available in all different size configurations to accommodate lots of different applications. Once the roof demo was complete and the flat roof was cleared of any remaining debris some rotted 2x material around the perimeter of the roof was replaced. Choose this option for areas that need a good amount of strength and water resistance.

What insulation to use. As part of insulating your flat roof be sure to contain and seal all bypasses. Of the three basic types blown in insulation is the easiest to install but it requires a skilled professional. It provides r values that range from 3 6 to 4 2 per inch.

Blanket insulation or rigid styrofoam will be the least expensive but depending on the accessibility it may be difficult to. This type of un vented roof has proven reliable when properly installed. Spray foam using spray foam would be an excellent option. The effective roof insulation layer may range in thickness from 3 to 12 cm as needed.

That styrofoam insulation will work but it is not cheap per r value however it gives you a great r value per inch. This is an even more dense and more expensive foam board insulation.