24 Inch Aluminum Foil

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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 am specifically considering the re-roofing of a an older home where rafters were made with 2x4 or 2x6 and the rafter space (and possibly the attic space) does not allow sufficient space for insulation and proper ventilation behind the insulation. The old layers of roofing have to be removed in any event. At this point I am considering applying insulation boards on the existing sheathing and then a new layer of sheathing before the new roofing material. (similar to a SIP: structural insulated panel) The two issues I am concerned with is that the insulation can act as a vapor barrier. Would condensation potentially rot the lower sheathing. How is this avoided in SIP roofing panels? The second issue may be with fire regulations.
The sip panels are vented depending on what thickness over all that you want. The last ones I used had 4 inches of rigid foam board then on top of that had 3" strips every 16" an inch thick which created an airspace. On top was 5/8 Osb. To create an affective air flow the fascia cannot plane through with the plywood at the bottom but fall just short of the 1" space. To cap it a oversized vented drip edge is used. You must also have a ridge vent for proper flow. These panels can near 100$. You can do it your own way like I do when building log cabins by laying 2" foam down first then lay 2x4 16 on center on top then finally your plywood. If you use CDX instead of Osb it will outlast it by 100%. Rigid foam insulation is not like batt-faced. Rfboard ins. Is used in boat hulls and even after being submerged for long periods of time will return to its original density and r-value. For obvious reasons batt ins. Will not. You won't have a moisture problem as long as you don't have a venting problem. If you are using high hat lighting don't let the cans touch your rigid ins. Tuck batt in softly around them TAKE THE PAPER OFF! By code if you have an interior wall 10or more ft. It must have a fireblock, simply a 2x4 turned flat between the studs. On your roof the ceiling you see inside, (most likely 7/8 tongue and groove boards) passes as the same. Good luck!
fixing my room up and it gets hot in summer so i want to put some good insulation in the roof so what could i use?
How much access do you have to the attic, or the space below the roof? Are you going to be replacing the ceiling of your room and adding insulation from below, or getting into the attic and adding insulation above your room from there? If there is a large attic space above your room, and not much ventilation, sometimes you can cool the living space by simply installing some ventilation grilles to the roof to vent off hot air from the attic.
roof was replaced eight years ago soon after there were leaks in the roof caused insulation toget wet then dry now the insulation is packed hard and has started to turn into power who would be responsible to replace the insulation.
Sorry; I don't know of any roofer that would take responsabilty after eight years. Unless your insurance might be an option. Check with them and decide if your deductable is more than the repair if you would be better off doing it yourself. I would also be concerned about underlying materials, sheet rock, lumber, MOLD. You need someone to check thoroughly for mold being as it has been so long. GOod luck; Flip;
the noise when it rains is very loud. can I place an insulation material under the polycarbonate roof to reduce noise? Thanks
Sure, depending on the roof space anyway.
Can you put fiberglass insulation on the under side of roof tiles in the loft in the house?
I would be concerned that this may cause moisture to form between the roofing and the insulation. They make a special foam panel that fit underneath the roofing in between the roof rafters. They allow air to flow from the eave to the roof's ridge.
We had a water leak in our pipes in our foundation and had to re-route our pipes along our roof. We have tried some really basic insulation for piping, but it usually deteriorates very quickly due to sun light and wind. What are some ways we can insulate our pipes effectively without having to re-insulate every month? This has to be something fairly simple and inexpensive. We aren't looking for perfect insulation, just something that will keep the water warm in the winter and cool in the summer.
they sell insulation at the home improvement stores. if you have tried that type then you will need to call a proffessional to insulate with fiberglass and wrap with tin protective cover. depends how cold it gets you may have to use heat tape also.
do i have to have insulation in my roof?
you should have insulation on the attic. ot should be right against the occupied ceilings. The attic cavity needs to be for the most part ventilated. That is a common building approach. Ive seen insulated sheets of plywood the roof shingles are nail to. You can call that roof insulator. You still better off with the common industry approach. Make sure you have an attic fan to level the attic temperature to the outside.