What GSM Tarpaulin Do I Need? The Complete UK Buyer's Guide

Choosing the right tarpaulin sheet comes down to one number: GSM — grams per square metre. Get it right and your cover lasts years. Get it wrong and you'll be back buying another inside a season. This guide explains every waterproof tarpaulin weight in our range, who it's for, and what you should never use it for.

What Does GSM Mean on a Tarpaulin?

GSM stands for grams per square metre — the weight of the tarpaulin sheet material measured over one square metre. A higher GSM means a heavier, thicker, more durable cover. A lower GSM means lighter weight, easier to handle, but less durable under punishment. The GSM rating directly determines how long your waterproof tarpaulin will last and what loads it can take.

Tarpaulin GSM Guide: Every Weight Explained

80–110gsm: Lightweight Economy Tarpaulins

Best for: One-season use, light duty covering, decorating dust sheets, short-term garden cover.

Avoid for: Permanent outdoor storage, agricultural use, anything exposed to prolonged UV or wind.

Our economy tarpaulins in this range are low-cost and lightweight — ideal when you need a quick cover that doesn't need to last. Expect 1–2 seasons of outdoor use before UV degradation sets in. Good for one-off projects and decorating protection.

120–140gsm: Medium Weight Tarpaulins

Best for: General outdoor use, garden furniture covers, log storage, caravan covers, light agricultural use.

Avoid for: Long-term industrial use, scaffold sheeting in high winds, PVC-grade protection requirements.

The 140gsm waterproof tarpaulin is our best-selling weight — and for good reason. It hits the sweet spot between durability and manageability. A 140gsm tarpaulin sheet will comfortably last 3–5 years under typical British weather. Our 140gsm green/silver tarpaulin is the UK's most popular all-purpose cover.

150–170gsm: Upper Medium Weight

Best for: Year-round outdoor storage, vehicle covers, bale covers, construction site sheeting.

Step up to 170gsm when you need a tarpaulin sheet that works harder. The 170gsm weight offers substantially better tear resistance and UV performance than standard 140gsm covers — expect 5+ years with regular use. Our medium weight collection covers the full 120–170gsm range.

200–270gsm: Heavy Duty Tarpaulins

Best for: Agriculture, construction, haulage, scaffold sheeting, machinery covers, long-term industrial storage.

Avoid for: Anything where light weight matters — these waterproof tarpaulin sheets are substantial.

This is where professional performance begins. A 200–270gsm heavy duty tarpaulin is UV-stabilised throughout the material (not just coated), reinforced with metal eyelets at close intervals, and engineered to survive years of demanding outdoor use. Farmers, builders, and hauliers across the UK rely on this weight range. Browse our heavy duty tarpaulin collection.

350–560gsm: Super Heavy Duty & PVC Tarpaulins

Best for: Permanent industrial covers, PVC-grade waterproofing, lorry curtain sides, pond lining, extreme weather applications.

At 350gsm and above, you're moving into professional PVC and reinforced PE territory. These tarpaulin sheets are virtually indestructible under normal conditions. A 350gsm tarpaulin can last a decade of continuous outdoor exposure. Our 560gsm PVC sheets are used by scaffolding companies, MOD contractors, and infrastructure projects across the UK.

Quick GSM Decision Guide

• Casual home use (1–2 years): 80–110gsm economy tarpaulin
• Regular outdoor use (3–5 years): 130–170gsm medium weight tarpaulin
• Heavy outdoor / agricultural (5–10 years): 200–270gsm heavy duty tarpaulin
• Permanent industrial or lorry use: 350gsm+ PVC tarpaulin

Does a Higher GSM Always Mean Better?

Not always. A 270gsm waterproof tarpaulin is overkill for covering garden furniture — you'll pay more and handle a heavier sheet than you need. The right GSM is the one that matches your actual use case. Overspec costs money; underspec costs you a replacement. If in doubt, call our team on 01744 520 110 — we'll recommend the right tarpaulin sheet for your application.

Colour vs GSM: Does It Matter?

Yes. The silver reverse on green/silver tarpaulins UK provides additional UV reflection, extending product life in sunny conditions. Dark green and brown covers blend into rural environments. Blue tarps are high-visibility for site use. The colour doesn't change the GSM rating, but can influence longevity in specific conditions.

Shop by GSM

• Economy Tarpaulins (80–120gsm)
• Medium Weight Tarpaulins (120–170gsm)
• Heavy Duty Tarpaulins (170–270gsm)
• Super Heavy Duty Tarpaulins (270gsm+)
• PVC Tarpaulins (350–650gsm)

Still not sure? Tarpaulins UK has supplied waterproof tarpaulin sheets to UK businesses and homeowners for over 60 years. Call us on 01744 520 110 or browse our full range of tarpaulins UK wide delivery.