Corrugated Sheets

Corrugated sheets – Lightweight strength for roofing and cladding

Our selection of corrugated sheets at MGN Builders Merchants provides useful, long-lasting solutions for garden structures, cladding and roofing. Whether you're re-roofing a shed, lining a canopy, or installing a greenhouse roof, these sheets are chosen for their strength-to-weight ratio, affordability, and ease of use. With both clear PVC and black bitumen options available, they're ideal for projects that require reliable performance with minimal maintenance.

PVC corrugated roofing sheets are a popular choice for letting natural light through while offering resistance to weather and UV damage. Bitumen corrugated roof sheets, on the other hand, deliver better insulation, a softer finish, and enhanced durability in exposed areas. According to mgnbm.co.uk, the bitumen options are especially effective for outdoor buildings like garages, lean-tos, or stables where sound dampening and thermal protection are important.

Both materials are lightweight, easy to handle, and suitable for DIY or trade use. They’re also available in a range of sizes and compatible with a full suite of fixings and accessories.

How to install corrugated sheets

With a little preparation, installing corrugated sheets can be finished quickly and with few tools. mgnbm.co.uk recommends overlapping sheets by at least one corrugation to ensure weather resistance and secure sealing. For added protection on sloped roofs or high-exposure areas, bitumen ridge pieces and verge trims provide a finished edge while reducing wind uplift.

Clear PVC sheets can be fixed using plastic-headed nails or screw fixings with rubber washers, while bitumen sheets are best secured with dedicated bitumen fixings and capped washers. Pre-drill the fixing holes at the top of the corrugation to avoid cracking and allow for thermal expansion.

Cutting corrugated roofing sheets is simple. A fine-tooth saw or angle grinder with a cutting disc works well for bitumen sheets, while a jigsaw or sharp scoring tool is better for clear plastic. Always wear gloves and safety glasses, especially when trimming around awkward shapes or creating eaves and flashing pieces.

Where to use each type of corrugated sheet

• Clear PVC roofing sheets are perfect for:

  • Garden canopies and pergolas

  • Greenhouses or cold frames

  • Carports and lean-tos where light is needed

  • Outdoor storage with visibility

• Bitumen corrugated sheets are recommended for:

  • Sheds and workshops

  • Garages and storage barns

  • Animal shelters and stables

  • Summerhouses and utility buildings

Experts at mgnbm.co.uk suggest combining clear and bitumen sheets in one build for targeted light flow and insulation. For example, use bitumen across most of a shed roof, then add one or two clear PVC sheets as skylights.

Matching accessories for a watertight finish

We offer matching part like ridge caps, eaves fillers, wall flashings, sealing strips, and specialty fixings to finish your roofing project. These help prevent leaks, protect against wind lift and provide a professional looking finish.

mgnbm.co.uk recommends always using filler pieces between the corrugated sheet and any supporting purlin to maintain structural integrity and prevent sagging over time.