Loft Conversion Roof Joists

The conversion from a trussed roof to a trussless roof simply involves the redistribution of the roofs weight from the trusses to beams running from gable to gable.

Loft conversion roof joists.

It is suitable for older style cut roof or a modern truss roof. Room in roof trusses can be craned into place to form the shell of a ready made new loft room with the insulation placed above the rafters for maximum thermal efficiency. Bungalows houses detached semi or terrace barns or garages. The main problem with raising the roof is that it requires planning permission and there s a fairly good chance this will be refused especially for terraced.

With the help of an experienced loft conversion company truss rafters are no obstacle. Looking back i was very lucky in that my roof had an unusually high 47 degree pitch and so there was lots of head room. Loft floors loft floor construction. This could be a hip to gable loft conversion or a mansard conversion for example.

Why would trusses cause a problem. Joists insulation and boarding. Ceiling joists consist of two narrow low grade timbers often bolted together sistered above a supporting wall. This option is the most expensive as it requires the complex removal and rebuild of the existing roof.

This process involves the installation and use of steel beams. There are certain ways and means around them which will leave you with a very usable habitable space. Often loft conversion projects can end up being a disappointment as on completion the owner finds out that roof height is very limited and as a result the space ends up being rather pokey. It is at this stage when the dormer windows are being constructed that your loft conversion will be exposed to the elements so you ll need good temporary sheeting to protect against the weather.

Changing the roof structure for a loft conversion. Existing loft joists are designed only to support ceiling boards so a structurally sound floor is needed. However the average dormer loft conversion with a double bedroom and en suite costs about 35 000 45 000.