GSM in Geotextile Membranes – What Does It Mean for Your Project? If you’ve been browsing geotextile membranes on Spudulica.co.uk, you may have noticed numbers like 100gsm, 200gsm, 300gsm popping up. But what does GSM actually mean, and why should you care when planning your DIY project? Don’t worry – we’ll break it down in […]