Off-site Manufactured Timber Dormers
In addition to the designed, engineered and manufactured timber elements, Crendon can supply in a convenient pack all the ancillary items needed to complete the installation of your roof and dormers.
High-quality Dormer solutions from Crendon Timber Engineering
Dormers are structural roof extensions that project vertically from a pitched roof, creating additional headroom, natural light and usable internal space. They are widely used to transform underutilised roof areas into functional living spaces such as bedrooms, offices and bathrooms.
Crendon Timber Engineering offers a standard prefabricated or bespoke dormer solution to ensure quality, enhance speed of build and improve safety by reducing working at height. An insulated dormer designed and manufactured off-site as part of your total roof solution, all dormers are fully engineered to your design and supplied on site either as a ‘kit’ or ‘complete’ ready to install.
By delivering fully engineered units ready for installation, dormers reduce on-site build time, addresses skill shortages, meet high demands and simplify sequencing to help keep your build programmes on track.
With nearly 60 years of experience and manufacturing in controlled factory conditions, Crendon delivers reliable timber engineered solutions that improve build quality, reduce risk and provide consistent performance across every project.
Designed, engineered and delivered as a complete solution
Each dormer is bespoke designed and engineered to suit your roof layout, structural requirements and site conditions, ensuring seamless integration with the roof truss system and full coordination from design through to installation.
Our CATG Frame Mark accreditation demonstrates our commitment to quality, compliance and consistent performance.
Dormer technical options
Our range of options can include factory insulated with a range of U-value options and/or A1 Fire Rated options.
Download our Dormers brochure
For more detailed information, specifications and project examples, please view or download our Dormers flyer.
Complete structural package
In addition to the structural dormer units, we can supply a fully coordinated package of ancillary components required to complete the roof or floor structure, ensuring everything required for installation is delivered together.
This simplifies procurement, reduces delays and improves overall build efficiency.
- Single delivery with all items needed to complete the roof or floor structure
- Choose from all the necessary straps, hangers and timbers
- Wall plate, gable straps, truss clips
- Timbers for infill, bracing, ply sheathing, strap noggins, valley gutters and eaves timbers such as tilt fillet, ply tilt and soffit framing
Dormer gallery
See how Crendon Timber Engineering Dormers are used across a range of residential developments, from loft conversions to large-scale housing schemes. Our off-site manufactured solutions help improve build speed, ensure consistent quality and deliver reliable on-site performance.
Dormer FAQs
Find answers to common questions about Dormers, including design, installation and suitability.
What is a Dormer?
A Dormer is a structural roof extension that creates additional space and natural light within a roof.
Are Dormers supplied ready for installation?
Yes, Crendon Dormers are manufactured off-site and delivered ready for installation.
Can Dormers be customised?
Yes, all Dormers are bespoke designed to suit your project requirements.
Do you supply additional components with Dormers?
Yes, we can supply a fully coordinated package including ancillary structural components required for installation.
Are Dormers suitable for all project types?
Dormers are suitable for a wide range of residential applications, including new builds, loft conversions and extensions.
Do Dormers comply with Building Regulations?
Yes, all Dormers are designed to meet relevant UK Building Regulations.
What types of Dormer are available?
Common types include flat roof, pitched roof, gable fronted, hipped and bespoke Dormers.
Do Dormers require planning permission?
In some cases, planning permission may be required depending on the design and location. This should be confirmed during the design stage.
What’s included in a Crendon Dormer package?
A typical package includes the engineered Dormer structure, design drawings and optional ancillary components for installation.
Are Dormers suitable for loft conversions?
Yes, Dormers are widely used in loft conversions to create additional usable space.
How long does it take to install a Dormer?
Installation is significantly faster than traditional methods due to off-site manufacturing, though timing depends on project size.
How much does a Dormer cost?
Costs vary depending on size, design and project requirements. Contact our team for a tailored quotation.
Speak to Our Team
Discuss how Crendon Timber Engineering can support your next project.
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