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FAQ

I have a split house with an attic where I have insulation on attic floor, but the house seems to be cold still, Can I add insulation to the roof of the attic? If so, any options? Thank you.

Most attics are vented, so I'm not sure how effective that would be.

This is blocking airflow and I'm having it removed after I bought the house. There is already insulation on the attic 'floor'. This is double insulated and is not correct. Why would anyone do this?

No building codes back then, and maybe he was thinking about putting an extra room up there then you would have to insulate the rafters also

I need to call around and find a contractor to repair my roof. I thought it might be a good idea to at least have the name of this type of roofing correct so I don't sound like too much of a mark. Thank you in advance for your assistance.

redneck style roofing

I am really confused about this science stuff! Sustainability is terrible xP

All versions of insulation are largely air that is kept from moving - air is a good insulator if convection - movement of heated or cooled air due to changes of density - is prevented. This assumes that a vapor barrier and caulking prevent actual air movement through the wall when a wind is blowing. Some insulators are also poor conductors of heat so the connection between inside and outside that might occur is broken. As it happens, glass used in fiberglass and minerals used in rock wool are actually pretty good conductors of heat in solid form but as fine particles and flakes they don't conduct well from one strand/piece to the next.

I have a converted loft which is really cold. The roof doesn't have any insulation, just a waterproof sheet, but i don't want to spend too much insulating it with the proper boards. If i use mineral wool and staple it across the roof trusses will it do a good job?

Yes, be sure to leave an air space between the top of the insulation and the roof deck to allow for ventilation, and use a vapor barrier on the interior side of the insulation.

were can i buy material to insulate pans and instructions to install it? I have seen many roofs with this done ,but , the lowe,s and home depots don't have .

metal pan usually refers to a pan that concrete is then poured into. If there is no concrete in it (and a flat membrane roof over that) then its called currogated metal roof. Either way they look the same. Hard to insulate cause they are not meant to insulate. there are some sold with insulation already attached - its a thin floam layer - thats a newer thing but not sure how new. heard of some mobile home mfgs and storage building builders using spray on insulation under the panels. As for aftermarket on insulating- you may be able to have spray on insulation applied from under neath - if the space is open and accessible. it looks and feels like foam, can get a bit messy , but maybe do-able depnding on your application. If its not a open space with maybe drywall under it - you might think about opening up the space in the ceiling and having blown in insulation done (much cheaper then sprayed on). Blown in will insulate just fine but someone would have to look at your application and area cause in some instances - blown in insulation can be bad for high moisture situations. also- if this happens to be in a house - by adding insulation to steel - you might be breaking fire code - something to keep in mind for safety.

My home is shaped like a square box. The four corners of the upper level have the roof pitch from the gables protruding into the rooms. The attic has no insulation and I need to insulate it. There is access from the attic to look down into the wall/ceiling that protrudes into the room. I can insulate the attic myself but the surface area of these protrusions is rather large. What would be the best way to get insulation down in there? Shoot the insulation in and poke it with a stick to make sure there is good coverage down in the wall space? The opening is about 6 inches high.Thanks.

Loose fill cellulose can be blown into your attic. I don't know if I understand the protrusions that you are describing but if you can freely blow the cellulose fiber into this space it should serve as a good insulation. You don't want to poke it in with a stick because you don't want to compress it. If you cannot blow this product directly into the space, you would be better off stuffing it lightly with fiberglass batting. Just don't cram it too tightly. It needs to be loose to be most effective.

I live in the top most floor of a flat. Is it worth to insulate the roof (from inside) with styrofoam(thermocole) to reduce the airconditioning load. Is it really economical with respect to cost of insulation and savings gained? Any experiences?

You want to insulate at the ceiling joist level, not at the roof-rafter level and provide ventilation for the remaining cavity. You also want to make sure you have the correct vapor barrier. But you do not want to insulate directly below and contacting the roof deck. One of the difficulties with rigid insulation is making it fit correctly and without gaps. So be careful of that. You may have to supplement the rigid sheets with foam spray at the gaps, around wires and pipes and so forth.