Attic Truss Guide

Attic trusses (also known as 'room in the roof' trusses) are one of the most cost effective ways of adding floor area to a building.

In most cases, where a roof is suitable for standard trusses it is also suitable for attic trusses as long as a few simple considerations are made:

	Align stairwells parallel to the trusses, not cutting across them.
	Keep dormer windows on opposite sides of the roof in line with each other.
	Try to avoid using dormer windows over 1.8 metres in width.
	Keep velux windows small enough to fit between trusses.
	Ends of ridge lines must be supported by trusses, keep dormer windows and stairwells away from them.

Always inform us of any dormer windows or stairwells to be installed. Even items to be installed at a later date must still be designed for from the beginning. Trusses can not be cut at a later date. Never cut trusses!

Trusses for roofs over 3.6 metres in height must be made in two parts due to delivery height restrictions. These situations should be avoided where possible because the cost is significantly increased and the maximum room width is reduced.

All attic trusses supplied by us are designed for a domestic floor load of 1500N/m2 (which is standard in the UK), unless otherwise requested.

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