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How do I know if I am using the right batten sizes?

The revised British Standard Code of Practice for slating and tiling, BS 5534 : Part 1: 2003 gives the following recommendations for single lapped tiles:

38 x 25 mm tile battens for rafter centres up to 450 mm.

50 x 25 mm tile battens for rafter centres up to 600 mm.

For natural and artificial double lapped slates the British Standard recommends the use of 50 x 25 mm slate battens for all rafter centres up to 600 mm.

For concrete and clay double lapped plain tiles the British Standard recommends the use of 38 x 25 mm slate battens for all rafter centres up to 600 mm.

 

What is the best way to insulate a new roof or re-roof project?

The ideal solution for a new build or re-roof project is to have insulation between and under the rafters. Ideally it needs a continuous surface for the breathable sarking membrane so that it can be installed in horizontal runs under counter battens with laps sealed.
The next best solution is to have insulation between and under the rafters with no continuous surface for the breathable sarking membrane. In this instance the membrane is installed in vertical runs with laps sealed under counter battens.


What are the benefits of using a dry ridge system?

Dry fix systems offer a number of advantages over the traditional method of mortar bedding.

These include:
Allows all-weather laying and fixing

Essentially maintenance-free

Overcomes problems associated with mortar such as cracking and loss of ridges in high winds

Provides full mechanical fixing of all components to resist highest wind speeds ever likely to occur

Provides continuous ventilation at the ridge - this is particularly useful in many modern buildings where the use of insulation between or above the rafter precludes the use of traditional ridge vents

Provides a consistent attractive finish


What is the life expectancy of roofing felt for a flat roof?

What is the life expectancy of roofing felt for a flat roof?
Based on industrial estimates, life expectancy ranges from 5 years to 30 years dependent on the product used. Each manufacturer provides a product guarantee, which should be used as a guide to longevity.


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