Spray type foam roof insulation?

Question

I have been looking at various websites for companies that install sprayfoam insulation to roofs as an alternative to roof replacement. Does anyone have any experience of such installations (looking for pros and cons)

Answer 1

Spray foam insulation is really good when the correct foam is used in the correct application. I am not so sure why you think that foam is an alternative to roof replacement however.

Foam comes in two basic varieties. High density and low density. High density foams have higher R-value per inch (more insulation value) than low density. However, high density foam is very rigid and stiff when fully cured, it will expand after being applied and can possibly deform any structure around it. Also, all foams are very sticky and typically bond permanently after being applied.

Foam is really great for a roof because it does not succumb to moisture damage and serves dual purpose as an insulator and a vapor barrier. It is the insulator of choice for any unvented catherdral ceiling because of this.

The cons of foam are that it's messy, more expensive than fiberglass batt and must be installed by a professional.

To answer your question, foam insulation is not going to be a substitute for roof replacement but it is probably one of the best ways to insulate that part of your building.

Answer 2

I have used this in commercial applications. Always remember, the roof is only as good as the roof under it if you are considering applying it over another roof type. Problems will arise if you have moisture trapped in old roofing or insulation that is not thoroughly dry when the foam is applied. This is hard to see without some type of infrared imaging to tell you. I have experienced cracking in the foam along expansion joints if they are not installed correctly. I usually consider it as a temporary (10 yrs.) roof until I can get time/money to come back with a permanent solution. One benefit is the insulation. Foam roofs do require close observation and quick maintenance to address problems early if they develop. They can also be considered an encapsulation method for asbestos containing materials that may be cost prohibitive to remove. Do your homework and find a good installer.

Answer 3

It will insulate and hold the bare tiles/slates together,but i do not know how it will replace your roof.if you are usind the very sticky foam to repair,it will work but is very untidy and really should be regarded as temporary.It is so sticky as to be unmoldable and ends up looking like frog spawn if released on a surface.i really would need to know exactly what /where on the roof you are talking about.(USE DESPOSIBLE GLOVES ANYONE USING THIS FOAM,IT IS VERY VERY HARD TO GET OFF THE SKIN)

Answer 4

Spray Foam Insulation is the right choice for both home and commercial applications. Actually it is the highly energy efficient and versatile product i would recommend. It is the highest performing insulation product at present.

For more details check out the aaffordable spray foam insulation at http://www.aaffordableinsulators.com/spray-foam.php

Answer 5

first the spray foam type application works very well ..it stops the roofing tiles and slates from moving and stops all the draughts ..BUT..its not cheap.. and secondly if you are thinking of having any works done in the loft in the future then don't have the stuff ..it is impossible to remove without breaking every tile ..it really stick that well