Counter battens are needed when sarking or plywood boarding is installed directly onto rafters, except in situations where slates are nailed directly into timber sarking. At the eaves, insulation can be pushed up to the underside of the Permo® underlay.
How do you counter batten cladding?
Counter battens must be at least 16mm thick. Cladding support battens should be at least twice the thickness of an individual board. The top edge should be machined, prior to preservative treatment, to an angle (15°) sufficient to shed water running down the back of the cladding into the ventilation cavity.
Are battens necessary?
You do not have to use a batten roofing system under most building codes. In some cases, it is necessary, but in most cases using batten on your roof is a choice to gain the benefits of using this system. There are primarily two options for roofing, a direct to deck system or a roof batten system.
What size should counter battens be?
Counter battens installed with rigid insulation material should be a minimum of 38 by 38mm fixed through the insulation into the structure below with helical fixings.What is the purpose of a counter batten?
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.
Do you need to counter batten vertical cladding?
Boards are fixed to support battens to create a drained and ventilated cavity. A continuous air gap is essential and, with vertical cladding, counter battens will usually be needed to ensure cavity ventilation is maintained.
Do you need to counter batten TLX Gold?
Because the TLX Gold at 33mm thick compresses down to only 3mm, this means that it can be used draped between the rafters with the tile battens straight over, with no need to raise the roof by requiring counter battens as do competitor products.
Do I need membrane under cladding?
Does Fibre Cement Cladding Need a Membrane? Well, the answer is that it depends. Because fibre cement cladding is naturally very resistant against water and water exposure, there is a relatively low chance of water damage penetrating through and posing a risk to your home.Do you need battens for cladding?
It is recommended that the battens used to support your Cladco wall cladding be made from composite material, this helps to maximise the long term performance of your cladding.
Why is roof batten blue?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.”
Article first time published onHow far apart should wall battens be?
The battens need to be as close to 400mm apart as possible allowing for the fact that you need the end of a plaster lath to fall on the centre of a batten so the next board can share the same batten.
How long do roof battens last?
You can expect traditional roofing felt to last for about 30 years, although this will depend on the conditions it’s exposed to. Other modern alternatives tend to be more durable, although they’re usually more expensive.
What is the difference between a batten and a purlin?
But a “purlin” is applied directly onto the roof rafters, running perpendicular between them, while a “batten” is nailed to roof sheathing or applied over an existing roof for installation of a new roof. … Also, rigid insulation can be placed in the space between battens.
Should a metal roof be installed over battens?
By design, some metal roofs MUST be installed over battens, some MUST NEVER be installed over battens, and some can be installed over battens OR solid decking. So, whichever way you go, it’s important to choose the right product and install it per manufacturer specifications.
How are battens attached?
True board-and-batten is made with vertically installed wide boards and narrow battens fastened over the gaps between the boards. … Board-and-batten can be installed onto solid plywood or OSB sheathing. If your sheathing is not solid, you will need to first attach horizontal furring strips.
How far apart are roof battens?
The minimum overlap is 100mm. If additional fall protection is required on steel sheet roofs, Stratco Ceiling Battens may be fixed intermittently between Stratco Roofing Battens giving a batten spacing no greater than 600mm. Roofing battens are suitable for non-cyclonic conditions up to and including W41 (N3).
Which of the following is true about effective depth of battens?
Which of the following is true about effective depth of end batten? Explanation: Effective depth of end batten should not be less than distance between centre of gravity of component and should be greater than twice the width of component member.
What is the U value of TLX Gold?
RELEVANT EXCERPTS FROM PART L1B: The performance of the roof should be improved to achieve a U value of 0.18 W/m2.
What is a Sarking board?
Sarking boards are softwood boards, generally about 150 mm wide, that are attached to the rafters of a pitched roof to give extra strength to the overall structure of a building. … Firstly, sarking boards are typically used on buildings that are exposed to extreme weather conditions, such as high wind or torrential rain.
What is cross battening?
1. To become fat. 2. To thrive and prosper, especially at another’s expense: “[She] battens like a leech on the lives of famous people, … a professional retailer of falsehoods” (George F. Will).
How far apart should battens be for vertical cladding?
Battens should be set at a maximum 600mm centres for vertical and horizontal cladding. 400mm centres should be used if boards are being fitted in a diagonal layout.
Should battens 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.
What do you put under cladding?
A gap (normally at least 25mm (1 inch) for timber) for air circulation is required behind the cladding to ensure that moisture is not trapped. This needs to be considered where insulation is required behind the cladding, most insulation materials will need to go behind the vapour barrier membrane.
Do I need a breathable membrane?
When are they required? A breather membrane should be provided unless it can be established that: Any insulation in the cavity is resistant to wetting. … No water reaches the backing wall, either directly or by migration through the insulation.
Does timber cladding need ventilation?
2. Through ventilation should be provided behind the cladding, with an unobstructed air path at the top and bottom of the clad area.
Do you start cladding from top or bottom?
Fixing shiplap cladding Begin at the bottom, ensuring that the first board is level with the lap that is adjacent to the wall, pointing upwards. For boards up to 150mm wide, use a single fixing located 25 – 30mm above the lower lap.
Do roof battens rot?
You can get some rot in roof battens, but, generally, it’s at the roof’s edges, such as at chimneys or in verges – the edge of a roof that has a gable. Battens in the main body of the roof do not rot, unless there are some major long-term defects, or the tiles have become porous.
Why is roofing batten 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. It is part of the trademark that sets the JB battens apart. … This gives a straight distortion free batten that is light to handle and meets the required moisture content in BS 5534.
Are blue roof battens treated?
Our timber batten is pressure treated to resist rot and insect attack, and machine graded to meet BS5534.
What wood is used for battens?
Cedar is a common choice for exterior board and batten siding, but other acceptable wood species include Cyprus, redwood, locust, white oak, and hemlock.
What is tile batten?
Battens are the lengths of wood that are laid in-between the rafters to secure the roofing felt and to accept the tiles or slates when they are fitted. … They are used to locate the roof covering in straight, consistent rows, and provide a strong anchor for the nails or clips used to secure the tiles or slates.
