3 In Gauge For Expansion And Contraction In Siding

Expansion and contraction should be taken into consideration when roofing with steel.

3 in gauge for expansion and contraction in siding.

The nails should always be in the center of the slot as shown in figure 2 there is one exception which will be discussed later that is provided in the nailing hem. Driving the nails properly is critical for a professionally completed project. If the panels are 20 feet 6 1 meters or longer refer to the manufacturer s instructions for how to increase the gap. In this arti cle i ll explain the methods contractors should use to avoid callbacks.

Nail through the top flange which is the longer of the two flanges. Vinyl siding has to have room for expansion and contraction. A rule of thumb for ascbp steel roofing is any panel exceeding 40 feet in length should have a system that allows for expansion and contraction ie. Longitudinal cote 6 7x10e 6 in in f transverse cote 7 65x10e 6 in in f.

Mdf like other wood products with absorb and desorb moisture with changes in humidity. Allowance should be made for expansion and contraction by leaving a 1 4 6 4mm gap between the siding and all corner posts and channels. Can be used if the screws do not restrict the normal expansion and contraction movement of the panel on the wall. Level the playing field in most cases siding should be installed level.

The following table provides the coefficients of linear thermal expansion and representative thermal expansion values for various building materials where possible the values were taken directly from manufacturer technical data sheets and reflect the coefficients of linear thermal expansion for specific representative products. Loose siding panels or wavy siding. The following expansion values should be used for considering this type of movement. Coefficient of thermal expansion cote per astm e228 is.

Increase to 3 8 9 5mm when installing in temperatures below 40 f 4 4 c. On the first board a second nail should be placed approximately 1 from the bottom edge. Not less than 16 gauge semi flattened to an elliptical cross section. Use a nail gun with 18 gauge 1 3 4 long brad nails.

Properly fastening azek trim and moulding material along it s entire length will minimize expansion and contraction. James hardie recommends designing for this type of movement on buildings with long runs of continuous siding. Over 90 of these problems are because of fastening methods that do not allow the vinyl and aluminum products to expand and contract freely.