Spacing On 1x4 For Metal Roof

Metal roofing source grand rib 3 multi purpose classic rib grand rib 3 panels are a strong durable economic and attractive answer to the growing demand.

Spacing on 1x4 for metal roof. A metal roof must also allow for some overlap on each side of the panels which will reduce the effective width of the panel. The purpose of the purlins is to provide a solid foundation for the metal roofing panels and trim to be screwed to. To determine how far apart to set rafters measure the width of the metal panel and then the width of the first hill and valley of the panel. Wider panels allow for greater spacing between rafters.

Let s take a look at the most common types of metal roofs for houses. Twenty four inches is a common spacing of furring strips for a metal roof. If an open grid framed roof or widely spaced old solid roofing planks as the sheathing it is important to tightly stretch this so it does not sag down and hold water between the framing roof sheathing boards and the metal roofing obviously far better to put down a solid sheet sheathing first when doing a reroof in that sort of situation. Some contractors feel that 7 16 osb roof decking is a poor choice for the supplied screws preferring the solid 1x4 s.

Refer to the rain carrying table in this booklet for the maximum allowable panel length per slope that will provide adequate drainage. Roof pitch the metal roofing panels shown in this manual require a mini mum slope of 2 per foot to ensure proper drainage. The 1x4 s are usually applied right over the shingles once the sheeting and shingles overhangs are cut off. We do recommend it however.

Purlins are non pressure treated 1 x 4 x 12 lumber that is installed on to the roof in a specific layout pattern and screw pattern. Trim the most common flashing for metal roofing is the ridge cap which is used at the peak of a roof. Metal roof installed on 1x4s that is how the tin often gets put on homes up here on acerages and farms. An affordable option and easier to lay than shingles tin is the most commonly used type of metal roofing.

See page 6 for more information on screw spacing and ordering. Correctly measure the spacing of furring strips for a metal roof to further decrease condensation.