Spray Foam Insulation Over Wiring

3 set the insulation batt on the floor with the chalk line facing toward the ceiling.

Spray foam insulation over wiring. 2003 about the oversite of nm b bundling and bundling in fire draft applications. Regardless a red flag has gone up and the state of minnesota is looking into the issue. I find it hard to believe that building officials are ignoring a fire hazard. Wiring in spray foam insulation on a related note the iaei published a report back in sept.

I believe either too much foam was installed in one lift or the foam rolled over on itself during the installation process causing a build up of heat which melted the wire insulation. The insulator spray foamed closed cell all of the roughed in romex. After the wiring is in place the insulation can be laid in. Most homes are insulated using batt or roll insulation.

I do not see a lot of spray foam in the walls in new construction around here. This is not for a client i am just trying to get better educated. Medium density foam insulation is comparable to board stock products do not do any wiring while spray foam insulation is being sprayed. Spray foam insulation is generally used in most modern houses to provide protection against very hot or very cold conditions by keeping the temperature inside at a tolerable level.

Never allow foam to touch exposed wiring. If you don t see a line apply another coat of chalk to the wire and push the insulation back into the cavity. Wipe away imperfections with a cloth soaked in great stuff foam cleaner. If using great stuff pro with foam dispensing gun follow these additional steps before application.

1 remove the wiring first and put it in conduit over the sheetrock when i install that over the foam. While there may be debate between individual contractors about spraying foam insulation over electrical wires industry guidelines state that spray foam insulation can be applied directly over electrical wiring. At the finishing stage. Store or dispose of the product as per directed on label.

So i have never thought about this before. A safe practice is to avoid working in the area while spraying is taking place and for a period of time up to 24 hours thereafter as recommended by the spray foam manufacturer. Foam should be tack free in 10 to 15 minutes. The results are rather interesting.

Does spray foam insulation affect electrical or other work in the attic. The city inspector was giving the electrician a hard time about it but passed it. Code officials have accepted the use of spray foam insulation in residences for a long time and it s common to encapsulate non metalic cable romex in spray foam.