Building Construction Handbook, Eighth Edition
Timber Roof Joists ~ the spacing and sizes of joists is related to the loadings and span, actual dimensions for domestic loading ...
Ref. BS 8217: Reinforced bitumen membranes for roofing. Code of practice. Timber Flat Roofs---2 ...
Conservation of Energy ~ this can be achieved in two ways: 1. Cold Deck † insulation is placed on the ceiling lining, between jo ...
Built-up Roofing Felt ~ this consists of three layers of bitumen roofing felt to BS EN 13707, and should be laid to the recommen ...
Milled Lead Sheet ~ produced from refined lead to an initial thickness of about 125 mm. Thereafter it is rolled and cut to 12.00 ...
Thermal Movement ~ the coefficient of linear expansion for lead is 0.0000297 (2.97¾ 10 †6) for every degree Kelvin. Eg. If the e ...
2mm lead sheet 50mm high wood cored roll, 25mm wide at base 25mm rebate for lead nailed every 100mm anti-capillary groove smooth ...
Spacing of wood cored rolls and drips varies with the thickness specification of lead sheet. The following is a guide ~ Typical ...
A dormer is the framework for a vertical window constructed from the roof slope. It may be used as a feature, but is more likely ...
roof slope Pitched options gable or hip end eaves alternative ceiling joist/tie ridge board trimmed common rafters alternative h ...
A graceful interruption to the routine of a pitched roof, derived from thatched roofs where the thatch is swept over window open ...
Air carries water vapour, the amount increasing proportionally with the air temperature. As the water vapour increases so does t ...
Roof ventilation † provision of eaves ventilation alone should allow adequate air circulation in most situations. However, in so ...
Refs. Building Regulations, Approved Document C † Site preparation and resistance to contaminants and moisture. Section 6 † Roof ...
Lateral Restraint † stability of gable walls and construction at the eaves, plus integrity of the roof structure during excessiv ...
Preservation ~ ref. Building Regulations: Materials and Workmanship. Approved Document to support Regulation 7. Woodworm infesta ...
Preservation ~ treatment of timber to prevent damage from House Longhorn beetle. In the areas specified (see previous page), all ...
Green roof ~ green with reference to the general appearance of plant growths and for being environmentally acceptable. Part of t ...
Typical extensive roof build up ~ grass/sedum soil filter layer or fleece drainage layer* waterproof membrane insulation vapour ...
Thermal insulation of external elements of construction is measured in terms of thermal transmittance rate, otherwise known as t ...
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