So you want r value on your attic floor and radiant barrier at the roof.
Roof radian barrier specs.
Above sheathing ventilation with radiant barrier roof assemblies sharkskin ventilated roof mat w sharkskin ultra radiant create both above sheathing ventilation asv and sharkskin ultra radiant reflects radiant heat and creates a cooler attic which reduces cooling costs.
The most effective radiant barrier sheathing is a structural roof sheathing panel which consists of an osb panel with heat reflecting foil laminated to one side.
As the original 1 brand of radiant barrier sheathing lp techshield panels vaporvents technology prevents moisture buildup during and after construction while blocking up to 97 of radiant heat in roof panels.
The problem with putting any r value on a roof is that the roof is normally not really part of the thermal envelope.
Solid single sided radiant barrier foil 48 wide.
The thermal envelope is usually your walls and ceiling.
Find out whether it s worth the money to install a radiant barrier in your attic.
Radiant barrier foil insulation systems block radiant heat energy instead of absorbing it like fiberglass insulation.
Since radiant heat is in a waveform it can be reflected.
The answer is that there are other things you can do that would be more effective in terms of energy efficiency.
Installed in over 1 5 million homes in the united states lp techshield panels also lower attic temperatures up to 30 f.
This basically allows for wood rot to continue and inspectors have a more difficult time finding areas of concern.
A radiant barrier works best when it is perpendicular to the radiant energy striking it.
See contractor testimonial below.
The osb techshield radiant barrier osb is engineered to improve energy efficiency.
Other kinds of radiant barriers combine reflective materials usually aluminium foil with materials like plastic films cardboard and kraft paper.
How to measure your attic.
Installing 19 inches of batt insulation or 22 of blown in is the single most cost effective way to reduce your heating and cooling costs.
Perforated house wrap radiant barrier foil 60 wide.
For example most homes don t have enough insulation to start with.
Solid double sided radiant barrier foil 48 wide.
Your radiant barrier makes the roof deck sheathing invisible from the attic.
It reduces attic temperatures by up to 30 degrees fahrenheit and it blocks up to 97 of radiant heat.
This reflection insulation also has high mechanical properties making it perfect for load bearing applications in construction.
A radiant barrier reduces the radiant heat transfer from the underside of the roof to the other surfaces in the attic.
The hot roof material then radiates its gained heat energy onto the cooler attic surfaces including the air ducts and the attic floor.
45 wide perforated double sided radiant barrier foil superperf 48 wide radiant barrier foil white vinyl perforated.
Also any water leak will fall onto the backside of the radiant barrier and roll down the slope until it reaches the eaves soffits.
