How to Build a Shed Roof (Apex & Pent – UK Guide)

Building a shed roof correctly is essential for keeping your shed weatherproof, durable, and long-lasting. This guide explains how to build both apex and pent shed roofs, including timber structure, coverings, and best UK practices.

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Understanding Shed Roof Types

The two most common shed roof designs in the UK are apex and pent. Each has different structural and drainage benefits.

Apex roof: Traditional pitched roof with a central ridge – ideal for rain runoff.
Pent roof: Single sloping roof, modern look, ideal for positioning against walls.

Explore available designs: Apex Sheds | Pent Sheds

Large apex roof shed installed on concrete base

What You Need to Build a Shed Roof

Structural timber (rafters, ridge board, joists)
Exterior grade OSB or tongue-and-groove boards
Roofing felt or felt shingles
Galvanised nails or screws
Drip edge or fascia boards

Quality materials ensure better weather resistance and longer life.

Large apex garden shed with two doors and four windows

How to Build a Shed Roof (Step-by-Step)

Build the roof frame – Cut rafters to size and assemble on flat ground.
Fix the frame to the shed walls ensuring it is square and level.
Install roof boards using exterior-grade boards or OSB.
Add roofing felt, starting from the bottom edge upward.
Secure ridge cap for weather protection.

Tip: Always allow a small overhang at the front and rear to prevent rainwater running down the walls.

Choosing the Right Roof for Your Shed

The best roof depends on size, exposure, and use:

Apex roofs: Better drainage, classic appearance
Pent roofs: Modern look, ideal for wall placement
Heavy-duty sheds: Thicker framing and stronger felt systems

Explore suitable models: Heavy Duty Sheds, Medium Sheds, Large Sheds

Common Mistakes to Avoid

Not allowing enough roof overhang
Fixing felt in cold or damp conditions
Skipping battens or ridge protection
Using indoor-grade timber outdoors

Avoid these mistakes and your roof can last 10–15 years or more.

Final Thoughts

Building a shed roof correctly protects your investment and ensures years of reliable use. Whether you’re repairing or starting from scratch, proper materials and technique make all the difference.

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