Fanfold Insulation Under Vinyl Siding

Offers tough poly facers for added strength and durability important in storing handling and installation.

Fanfold insulation under vinyl siding. And it is an air barrier if tape seamed rightt althought the tyvek did that already. 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. 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. Tyvek under 1 4in foam for vinyl siding.

It also reduces heat bridges through the 2x4 studding. 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. I have never heard of putting anything under or over maybe you guys are using the wrong fanfold insulation try greenguard or polar wrap. A corresponding editor paul fisette responds.

It also serves as an air 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. Fanfold when every penny counts you can rely on the performance of our most economical fanfold siding underlayment. 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.

Home accessories 3 8 fanfold insulation sheathing underlayment 3 8 fanfold insulation sheathing underlayment cellofoam s poly shield heat laminated sheathing. That is what i have always used and i tape the joints. Before installing vinyl siding over existing wood siding we first install a layer of fan fold foam insulation. 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.

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. 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. Is the fan fold foam an adequate weather resistive barrier. I just added these intructions.

Rigid foam will shed any water that gets past leaky vinyl siding.