4th Floor
Silverstream House
45 Fitzroy Street
London
W1T 6EB
Silverstream House
45 Fitzroy Street
London
W1T 6EB
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Contact
4th Floor, Silverstream House, 45 Fitzroy Street, London, W1T 6EB
E: info@kelpstudio.co.uk
T: 020 3835 2633
M: 07561 417319
Loft Conversion Structural Calculations
Turning your loft into a bedroom or office changes how the roof and floors carry load. We design the structure so it’s safe, buildable and ready for Building Control, working with homeowners, architects and loft builders across London, Surrey, Sussex, Kent and Essex.Get a quote or call 020 3835 2633
What we design
• New floor joists for the loft room, spanning between walls or new beams
• Steel or timber beams to replace purlins and struts so the space can be opened up
• Ridge beams and dormer framing
• Hip-to-gable and mansard conversions
• Trimming around the new staircase
• Checks that the existing walls and foundations can take the extra load
• Support details for any chimney breasts affected
What you get
• Building Regulations Part A structural calculations
• Drawings and details your builder can price and build from
• Answers to Building Control queries until the design is approved
• Site visits during construction when needed
How it works
1. Send us your architect’s drawings, or photos of the loft and a description of what you want.
2. We give you a fixed quote and, where needed, visit to inspect the existing roof structure.
3. We design the structure and issue calculations and drawings.
4. We support your builder and Building Control through to completion.
Common questions
Do I need structural calculations for a loft conversion?
Almost always. A loft conversion needs Building Regulations approval, and Building Control will ask for calculations for the new floor and any changes to the roof structure.
Can you work from my architect’s drawings?
Yes. Most of our loft work comes through architects and loft builders, and we coordinate the structure with their design.
Is my loft suitable for conversion?
Head height, roof shape and the existing structure all matter. We can visit and advise on what’s structurally possible before you commit to a design.
12+ years’ experience · £1,000,000 PI insurance
All our structural design services →
Wall removal and steel beam calculations →
1. Send us your architect’s drawings, or photos of the loft and a description of what you want.
2. We give you a fixed quote and, where needed, visit to inspect the existing roof structure.
3. We design the structure and issue calculations and drawings.
4. We support your builder and Building Control through to completion.
Common questions
Do I need structural calculations for a loft conversion?
Almost always. A loft conversion needs Building Regulations approval, and Building Control will ask for calculations for the new floor and any changes to the roof structure.
Can you work from my architect’s drawings?
Yes. Most of our loft work comes through architects and loft builders, and we coordinate the structure with their design.
Is my loft suitable for conversion?
Head height, roof shape and the existing structure all matter. We can visit and advise on what’s structurally possible before you commit to a design.
12+ years’ experience · £1,000,000 PI insurance
All our structural design services →
Wall removal and steel beam calculations →