Service

Loft Conversions

Turning unused roof space into a usable room means changing how the existing roof carries its loads. We provide the structural design that makes a loft conversion safe, stable and compliant.

Alterations to roof structures often require careful assessment of the existing arrangement to ensure new loads are adequately supported and structural stability is maintained. Whether creating additional living space within a loft, installing rooflights, forming dormers, removing supports or opening up vaulted ceilings, Tashi Structures develops practical structural solutions tailored to the existing building.

Our services include assessment of existing roof and floor structures, steelwork design, floor strengthening, support details and construction information suitable for Building Control approval and construction. The objective is always to maximise usable space while delivering a safe, practical and economical structural solution.

Key points

Assessment of the existing roof structure
Steelwork design for new openings
Floor strengthening for habitable loads
Dormer and rooflight support details
Maintaining overall roof stability
Information for Building Control approval

When you need this

You will need structural design where a conversion removes or alters existing roof supports, adds dormers or rooflights, forms a vaulted ceiling, or introduces new floor and access openings. It is also needed where the existing ceiling joists were never intended to carry habitable floor loads.

Frequently asked questions

Do I need a structural engineer for a loft conversion?

In most cases, yes. Converting a loft changes the loads on the roof and floor, and Building Control will require structural calculations and details for the steelwork, floor and supporting elements.

Will my existing ceiling joists be strong enough for a new floor?

Usually not. Existing ceiling joists are typically sized to support a ceiling only, so new or strengthened floor joists are generally required to carry habitable loads.

Can I remove the supports in my roof to open up the space?

Often yes, but only once alternative support is designed in. Removing purlins, struts or braces transfers loads elsewhere, so replacement steelwork or framing is designed to maintain stability.

Does a dormer need structural design?

Yes. Forming a dormer involves cutting into the roof and creating new openings, which requires beams and support details to carry the loads around the opening.

Will a loft conversion affect my party wall?

It can. Where works involve a shared wall, the Party Wall etc. Act 1996 may apply, and notice to neighbours may be required. We can advise on the structural aspects.