The combination of those 4 effects can sometimes cause an unexpectedly big gain in efficiency.
Fanfold insulation under vinyl siding.
Available in fanfold bundles where the insulation is crimped and folded to ensure it lays flat the underlayments are made of closed cell polystyrene which creates the ultra smooth flat and durable surface for adhering the vinyl siding.
In reality rigid foam board which sometimes comes in fanfold usually only has an insulating factor of r 1 and does not add any appreciable insulation effect to your home.
The q series products have an extruded polystyrene foam xps core with high impact polystyrene capsheets on both sides which make it one of the most durable products currently available.
Before installing vinyl siding over existing wood siding we first install a layer of fan fold foam insulation.
And even though some manufacturers call it rigid foam insulation for the purpose of vinyl siding it basically has the same insulating value as a piece of plywood.
Home accessories 3 8 fanfold insulation sheathing underlayment 3 8 fanfold insulation sheathing underlayment cellofoam s poly shield heat laminated sheathing.
I just added these intructions.
To be an effective weather resistive barrier though the seams of the fan fold must be carefully taped since any seam can provide a pathway for water to reach the structure under the foam.
Fanfold when every penny counts you can rely on the performance of our most economical fanfold siding underlayment.
A corresponding editor paul fisette responds.
Rigid foam will shed any water that gets past leaky vinyl siding.
That is what i have always used and i tape the joints.
You can add r0 5 again if the fanfold makes airgaps over clapboards below.
Offers tough poly facers for added strength and durability important in storing handling and installation.
It also serves as an air barrier.
Is the fan fold foam an adequate weather resistive barrier.
It is called fanfold due to the fact that it is stored folded up like a handheld fan often used years ago which makes it easier to unfold when it is ready to be installed on a home.
Nothing over or under.
Exterior fanfold insulation is the foam type of insulation that is applied between your home s exterior and the siding and it offers some protection from moisture in addition to creating a layer of thermal insulation.
And it is an air barrier if tape seamed rightt althought the tyvek did that already.
Installing foam insulation under vinyl siding is a wise choice for homeowners who are seeking to protect their homes against moisture infiltration as well as improve energy efficiency.
