Winter Roof Check — Preparing for the Wey Valley's Hardest Season

October is the last practical window for preventive roof work before winter. Once November arrives, the combination of shorter days, persistent rain and declining temperatures makes external roof work slower, more expensive and sometimes impossible. A pre-winter check in October identifies and fixes weaknesses before they are tested by the worst weather of the year.

What the Wey Valley Does to Roofs in Winter

The valley floor experiences conditions that surrounding higher ground does not. Cold air drains off the Surrey Hills and pools in the valley, creating overnight frost while the hilltops remain above zero. The River Wey and its floodplains maintain humidity levels 15-20% above the ridgeline. Wind funnels through the valley corridor during Atlantic storms, creating localised gusts that exceed those on the exposed hilltops. This combination — more frost, more damp, more wind than equivalent properties outside the valley — means Godalming roofs endure a harder winter than most of Surrey.

The Pre-Winter Checklist

Our October pre-winter check focuses on the components most vulnerable to winter conditions: ridge tiles (mortar cracking from thermal cycling?), hip tiles (secure against wind uplift?), lead flashings (dressed edges tight against masonry?), valley linings (clear of debris, draining freely?), gutters and downpipes (cleared, flowing, joints sealed?), chimney stacks (mortar sound, pots secure, caps in place?), and flat roof drainage (outlets clear, no ponding?). Each item is checked, photographed and reported. Any issues are quoted for immediate repair.

Emergency Preparedness

Even a well-maintained roof can be damaged by a severe storm. We recommend every Godalming homeowner keeps our emergency number saved: 01483 346 855. We attend 24/7, including bank holidays and during named storms. Our emergency vehicles carry tarpaulins, emergency tiles, lead patch material and boarding — enough to make most properties weathertight on the first visit. Having a trusted roofer's number before you need it saves critical time during an emergency.

Insulation Check

Winter is when inadequate insulation costs real money. The recommended minimum loft insulation depth is 270mm of mineral wool (or equivalent). If your insulation is below this level, heat loss through the roof increases your heating bills and creates temperature differentials that cause condensation. We check insulation depth during every loft inspection and can advise on topping up. We do not install insulation ourselves but can recommend trusted local installers who work in the Godalming area.

Book October

Pre-winter check slots fill fast in September and October. We recommend booking by mid-September to guarantee an October visit. The check costs £120-£250 depending on property size, includes a written report with photographs, and the fee is credited against any repair work booked. Call 01483 346 855 to book your pre-winter check.

The Freeze-Thaw Cycle — What It Does to Roofing Materials

Water expands by 9% when it freezes. This expansion is the single most destructive force acting on roofing materials in the Wey Valley. In concrete tiles, water absorbed into the porous surface freezes, expands, and micro-cracks the matrix. After 50 cycles per winter over 50 winters, the cumulative damage degrades the tile from a dense, waterproof unit to a porous, fragile shell. In mortar joints, freeze-thaw turns hairline weathering cracks into gaps that admit more water on the next rain — creating a self-accelerating deterioration loop. In lead, water trapped in dressed creases freezes and lifts the lead away from the masonry, creating wind-entry points that further admit water. Every one of these mechanisms is preventable by maintaining the water-shedding integrity of the roof surface — which is what our pre-winter check is designed to verify.

How the Wey Valley Winter Differs

Met Office data shows the Wey Valley floor averages 45-55 air frost events per winter compared to 30-40 on surrounding hilltops. This 40 percent increase in frost frequency translates to accelerated material damage. Concrete tiles that last 60 years on hilltops may last only 45-50 years on the damp valley floor because freeze-thaw is more intense and frequent.

The valley wind corridor creates its own weather during storms. South-westerly systems compress as they funnel between the hills flanking the Wey, creating localised gusts 10-15mph above the regional forecast. This is why storm damage in Godalming can be severe when surrounding towns report only moderate wind. Properties on exposed ridges within the valley face the worst of both worlds: valley-amplified wind plus ridge-top exposure.

Winter preparation for Godalming properties should account for these local factors. Mechanical ridge fixings eliminate the most common storm damage. Lead flashings should be checked for lifting before thermal contraction adds stress. Gutters must be clear before heavy rain tests capacity. And every homeowner should have our emergency number saved before they need it: 01483 346 855. We attend 24/7, including during named storms.