Construction of mansard roof structures to maximise usable loft space. Covers steep lower pitch, flat upper section, dormer windows, and full roofing to completion.
Typical cost
£15,000 — £25,000
Typical duration
3-4 weeks
Scope type
flexible
Typical tasks
Form structural frame for mansard profile
Install flat section with full waterproofing
Clad steep faces with slates or tiles
Install dormer windows
Fit all flashings and make weathertight
Extras & additional works
Based on a standard residential mansard roof of approximately 50m². Costs may increase if additional structural work or complex access is required.
Common questions Stainesai
The cost can be influenced by the size of the roof, choice of materials, complexity of design, and ease of access to the site.
Yes, mansard roof construction must comply with UK Building Regulations due to its structural nature.
Common materials include slate or tiles for the steep faces, and high-quality waterproofing materials for the flat sections.
A standard mansard roof construction typically takes 3-4 weeks, depending on the complexity and size of the project. Note that structural roofing work, such as a mansard roof, requires Building Regulations approval in the UK. Always confirm with your roofer before work begins.
The process includes forming the structural frame, installing waterproofing, cladding with slates or tiles, fitting dormer windows, and ensuring the roof is weathertight. Note that structural work like dormers requires Building Regulations approval. Always confirm with your roofer before work begins.
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