We use essential cookies to run this site, and optional cookies only with your consent. Cookie policy AcceptReject Open 7 days · Hours vary by day · 25 years' experience Office: 01279 216 215 | Mobile: 07932 442502 Services Areas About Our Work Blog Reviews Contact 01279 216 215 Free Quote - Home - Blog The J&Co Blog # Practical roofing & building advice from a Hertfordshire contractor. Real numbers, real timelines, real on-the-tools knowledge. Written by Jamie Pocock — owner of J&Co Contractors — for homeowners across Bishop's Stortford, Hertfordshire and Essex. Featured · Roofing ## Winter Roof Checklist: 12 Things Every Hertfordshire Homeowner Should Check Before December The 12 things that cause 90% of winter roof leaks in Hertfordshire — and how to spot them in 20 minutes from the ground. May 2026 7 min read Read the article Latest articles ## All posts Roofing ### 5 Signs Your Flat Roof Needs Replacing — Not Just Patching When patch repairs stop being economic. Five visible signs that a full flat roof replacement is the right call. 6 min Read Maintenance ### What Blocked Gutters Actually Cost You — and Why a £120 Clean Saves £6,000 Later The maths on what blocked gutters cause downstream — and the simple annual habit that prevents all of it. 5 min Read Roofing ### Chimney Leak After a Storm — What to Check Before You Call Storm-driven chimney leaks have four common causes. Here's how to identify which one you're looking at. 5 min Read Building ### Extensions: When You Need Planning Permission and When You Don't Permitted development covers more than most homeowners realise — but the limits matter. Here's the 2026 breakdown. 8 min Read Building ### Is a Loft Conversion Still Worth It in 2026? Costs are up, but so is the value added. Here's the honest 2026 answer for Hertfordshire and Essex homeowners. 7 min Read Guides ## Cost & advice guides In-depth guides on roofing and building costs, materials and warning signs. - Flat Roofing EPDM vs GRP Flat Roofs: Which Is Better? - Flat Roofing How Much Does a Flat Roof Cost in 2026? - Roof Repairs 10 Signs You Need a New Roof (Not Just a Repair) - Roof Repairs Roof Repair vs Replacement: How to Decide - Loft Conversions Loft Conversion Cost UK 2026: Full Price Guide - Loft Conversions Dormer vs Velux Loft Conversion: Which Is Right for You? - Extensions How Much Does a House Extension Cost in 2026? - Extensions Single vs Double-Storey Extensions: How to Choose Owner-led roofing and building contractors covering Bishop's Stortford, Hertfordshire and Essex. 25 years of hands-on trade experience. Open seven days. 01279 216 215 (office) 07932 442502 (mobile) info@jandco-contractorsltd.co.uk 1 Ugley Hall Cottages, Bishop's Stortford CM22 6JB Open 7 days a week - Sun 07:00–17:30 - Mon 07:00–17:00 - Tue 07:30–17:00 - Wed 07:00–17:30 - Thu 07:00–17:30 - Fri 06:00–18:00 - Sat 09:00–17:00 We accept VISAAMEX PayG Pay ### Roofing - All roofing services - Flat Roofing - Roof Repairs & Maintenance - Emergency Roof Repairs - Guttering, Fascias & Soffits - Chimney Repairs & Repointing ### Building & Construction - All building services - Building & Extensions - Loft Conversions - Renovations & Refurbishments - Brickwork & Masonry - Damp Proofing & Waterproofing - Plastering & Rendering - Patio & Driveway Installations - Fencing & Garden Walls - Property Maintenance ### Areas We Cover - Bishop's Stortford - Stansted Mountfitchet - Sawbridgeworth - Great Dunmow - Harlow - Saffron Walden - Epping - Ware - Hoddesdon - Broxbourne - Cheshunt - Welwyn Garden City - Stevenage ### Company - About J&Co - Our Recent Work - Blog - Customer Reviews - Contact Us © 2026 J&Co Builders Ltd · Trading as J&Co Contractors · All rights reserved. Privacy Policy Terms & Conditions Cookie Policy Call Now Free Quote