- Product Description
- Highly durable
- Used as an exterior building material for centuries particuarly for roofing applications
- Naturally occuring preservatives
- Resistant to fungal, insect and moisture decay
- Harvested from renewable well managed Canadian forests
- Fine even grain, low density and light weight making it easy to work
- Ideal for chalets, sheds, summerhouses, animal shelters and mobile homes
Cedar Eastern White Roof Shingles 2.3 sqr mtr pack
These are highly durable Grade A Eastern White Cedar shingles from Canada, where they have been used as an exterior building material for centuries particuarly for roofing applications.
After being cut from the block of Cedar each shingle is trimmed to create square corners and graded according to visual features.
Timber offcuts are converted into mulch which is used by gardeners and landscape architects.
Its naturally occuring preservatives make Eastern White Cedar resistant to fungal, insect and moisture decay which can be enhanced by extra chemical treatment.
These shingles are manufactured from cedar logs harvested from renewable well managed Canadian forests, which may allow re-harvesting in as few as 50 years.
Eastern White Cedar has a fine even grain, low density and light weight making it easy to work. The wood has a characteristic pleasing spicy aroma.
Cedar shingles are used on domestic dwellings and public buildings. They are ideal for chalets, sheds, summerhouses, animal shelters and mobile homes as well as conventional dwellings.
- Length: 400mm
- Width from 75mm to 300mm in each bundle
- Thickness (exposed end) 10mm
- Exposed area 100 to 150mm
- Minimum Roof Pitch 14 degrees
- Suitability: Roofs from 14 degrees to 18 degrees pitch: Suitable with 100mm exposed per shingle
- Supplied in bundles comprising approximately 2.3 square metres conaining varying widths of wedged shaped shingles
- Colour: After installation both the shingles will weather to a silver grey
- Eastern White Cedar Shingles are dimensionally stable and can be glued, stained or painted
- They are easy to work with hand tools
- With a low density of 0.3g/cm3 installed weight is only about 7kg/m2.
- Exposed area of shingle:100mm - 1.83m2
- Exposed area of shingle: 125mm and above - 2.32m2
- Eastern White Cedar shingles must be laid in accordance with the Code of Practice for Slating and Tiling, BS 5534 2003
- The roof structure should be checked to ensure that it is to a true line and squareness tolerance, and set out to ensure that: the minimum cutting of shingles is necessary, the long edges of the shingles are parallel to the direction at which the water will run off the roof. In some instances this may result in raking all the eaves and the ridge, the horizontal lines of the courses are straight and true (this is best achieved using a chalked line).
- Must be of sufficient thickness to allow nail penetration of 19mm. Battens of 50x25mm or 75x25mm are recommended.
- The roof should be counterbattened with 50mm counterbattens to allow free flow of air from eaves to ridge.
- A second horizontal eaves batten course should be fixed to allow for nailing the shingle with a 40mm overhang.Batten spacing corresponds with shingle exposure measurement.
- Adjust batten spacing within 12 courses of ridge so that final course is a full shingle.
- Shingles must be twice nailed 20mm from the shingle edge and 40mm above the exposure line.
- Nails should be driven home so that heads are flush with the surface but not so hard that the heads crush or split the wood.
- Staples should have an 11mm crown and a 31mm long x 1.5mm diameter leg, driven so that their crown is aligned parallel to the exposure line i.e. across the grain of the shingle
- To fix untreated Cedar shingles at 125mm exposure, we recommend the use of 31mm stainless steel ringshank pins (sold separately).
- Hotdipped galvanized, stainless steel or silicon bronze roofing nails may also be used.
- For fixing untreated Cedar shingles at 100mm exposure we recommend 38mm hot dipped galvanized, stainless steel or silicon bronze roofing nails.
- All nails should be ribbed, have a minimum of 4mm head and must be long enough to penetrate a minimum of 19mm into the batten.
- Shingles should be spaced with a 2mm gap for wet shingles and a 34mm gap if shingles are dry but installed in a damp or humid climate.
- The joint between shingles must not align in the subsequent 2 courses
- Either 1 or 2 under eaves courses may be used. Two under eaves courses are recommended in severe exposure areas.
- Where one under eaves course is used, the under eaves course should overhang the fascia by 20mm and the top course should overhang the under eaves course by a further 20mm.
- Where two under eaves courses are used, the first under eaves course should overhang the fascia by 13mm.
- The second under eaves course should overhang the first under eaves course by a further 13mm and the top course should overhang the second under eaves course another 13mm beyond that.
- The most efficient method for weathering hips and ridges is to use preformed ready tapered cappings (available separately).
- They are supplied in bundles which will cover 6 linear metres, in bundles of 30 (15 right and 15 left bevel), and they require no additional fabrication.
- Supplied untreated they weather to the same silver grey shade as shingles
- Install a 200mm waterproof flashing on both sides of the hip/ridge. Preformed 400mm long tapered cedar cappings with a 178mm flat width are fitted over the flashing.
- Cappings are fixed on each wing a minimum of 40mm from the tapered end and 20mm from the edge.
- Fixings should be the same as used on the rest of the roof slope. Subsequent cappings overlap the tapered end of the previous capping so that the exposed measurement is the same as the shingles on the rest of the roof slope.
- Cappings should be laid alternately with the right and left bevelled wing beneath.
- The image below left shows the righthand wing bevelled. On ridges start at both ends and work towards the centre. On hips the lowest capping should overhang the under eaves courses by the same distance as stated in the section & starter course above.
- Alternatively ridge or hip cappings can be fabricated from shingles as follows; Install flashing 200mm either side of hip/ridge. Select/cut shingles to the same width as the exposure measurement (100 or 125mm). Cut back edge of shingle on bevel plus 10mm on longer edge. Overlap one shingle onto the bevel on the other.
- Alternate overlap on succeeding courses. The exposed measurement on hips should be as the rest of the roof. On ridges, start at both ends and work towards the centre of the ridge
- The roof space and/or batten cavity must be ventilated in accordance with the latest edition of BS 5250 2002.
- Particular attention should be given to the need for adequate ventilation where the insulation follows the rafter line.