Battens should be fixed to rafters set at centres not more than 600 mm apart and should span at least 3 rafters. To ensure this, the battens should be at least 1.2m long. Battens should be fixed to rafters set at centres not more than 600mm apart. They should span at least three rafters and be at least 1.2m long.
How do you calculate roof battens?
1 Measure distance between top of eaves batten and top of ridge batten. 2 Divide distance by maximum gauge of tile being used. 3 Round figure up to give number of courses up slope as a whole number. 4 Divide measured distance by number of courses to give batten gauge.
Are battens structural?
The quick answer is YES. Roof battens no matter how you look at them are a structural element of any roof. Roof battens are one of those constantly misdiagnosed and overlooked aspects of roof construction. But roof battens provide some extremely important structural functions to protect your roof.
Do roof battens need to be treated?
Treatment – Roofing battens should be preservative treated to Use Class 2 in accordance with BS 8417. Different manufacturers use their own types of preservative treatment and may offer different guarantees as a result.
How many roof battens do I need?
To ensure this, the battens should be at least 1.2m long. Not more than one in four course of battens should be joined over one truss for gauges over 200mm. Below a 200mm gauge, there can be 3 consecutive joints in any twelve courses.
What size should roof battens be?
HSG33 makes clear that the batten should be a minimum size of 50mm X 25mm and meet the grading requirements specified in BS 5534 and NFRC Technical Bulletin 33 Graded battens for slating and tiling. Roofing contractors are expected to follow the safe system of work outlined in the guidance.
Should a metal roof be installed over battens?
Not all metal roofs can be installed over battens like that. Before even considering it, make sure the product you’re installing is approved by its manufacturer for that type of application. Basically all metal roofs that can be installed on battens can also be installed on solid decking with underlayment.
What is the main function of counter battens?
Counter battens are wooden strips that are installed vertically over pitched roofs to which horizontal tiling battens are attached. They are used to allow rainwater to pass off the tiles and away from your roof.
What are the symptoms of Batten disease?
Juvenile NCL (Batten Disease) begins between the ages of 5 and 8. The typical early signs are progressive vision loss, seizures, ataxia or clumsiness. This form progresses less rapidly and ends in death in the late teens or early 20s, although some may live into their 30s.
Are old roof battens treated?
If they are tile battens then from an old roof then that makes it more likely that they aren’t treated . The batterns are one off the first things to be replaced on any roof work and are far less likely to be retained and retro sprayed.
Why are roof battens red?
JB Red is the branding given to our BS 5534 graded roofing battens, which are coloured red to help identify the batten as graded on site. … This gives a straight distortion free batten that is light to handle and meets the required moisture content in BS 5534.
Why are roof battens blue or red?
Red, blue, green, gold: roofing battens are a colourful lot. … The reason our product is dyed blue is to distinguish it as meeting the necessary standard: it’s a colour commonly used by Nordic and Baltic suppliers. But it’s the BS5534 grading stamp, not the colour, that’s important.”
Should roof tiles be nailed down UK?
Every tile of the two rows at the eaves, those up the verges, and along the two rows of the ridge should be nailed, but beyond that it is only necessary to nail every fifth tile horizontally and every third tile as you move up the roof.
Why are roofing battens different Colours?
The original idea behind putting a dye into the battens’ preservative treatment was to make “graded” battens stand out from the usual, “ungraded” ones (which usually look a bit green in colour, on account of the type of preservative used) and for that reason, the colouring process was originally very successful – with …