Fanfold Siding Installation

Using proper siding insulation.

Fanfold siding installation.

Verify that substrate dry and free of foreign material that will damage the fanfold underlayment. The products are easy to handle score cut and install and no special tools are needed. If you have ever seen vinyl siding and the laps looked dirty all the time this is caused by heat buildup between the siding and the wall this heat excapes through the laps and causes stain. 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.

It also helps with wind infiltration through the walls. Foamular extruded polystyrene xps rigid foam insulation offers a comprehensive line of products in a wide choice of sizes thicknesses and edges with a lifetime limited warranty for the life of the home or building. R tech ff fanfold is a high performance sheathing consisting of a superior closed cell lightweight and resilient expanded polystyrene eps with advanced polymeric laminate facers. Fan fold is typically sold in 1 4 inch by 4 foot by 50 foot sections and is installed horizontally across the existing siding to level out irregularities before re siding with vinyl.

Fanfold board is worth the cost and effort to install behind vinyl siding. Fanfold foam residing board. Also it is a vapor barrior on boyh sides of the board. Dupont has said on their website and product flyers that if using both fanfold and housewrap and committed to both put the tyvek housewrap over the fanfold but they actually recommend assuming the insulation is totally closed cell with very low absorption rate putting the insulation directly under the siding overlying dupont drainwrap which is designed to provide a better drainage path between the two than regular housewrap.

Beginning of installation means installer accepts the existing conditions. It also helps to level the walls so you get a better smoother siding job. Fanfold foam residing board is a thin perforated extruded polystyrene foam board faced on one side with a plastic film facer and combines proven xps foam technology with a unique design to enhance the application of new or replacement siding. Like bob said it helps with sound insulation.

This creates a horizontal seam every 4 feet. If the existing siding is damaged remove it and install tri built fanfold underlayment directly to the substrate. Products can be used on wood steel framing or concrete walls.