Do You Need a Roof Survey Before Buying a House?

Why a Standard Homebuyer Survey Misses Roof Problems

When you're buying a property in Reading, Oxfordshire, or anywhere across the South of England, you'll almost certainly pay for a RICS Level 2 (HomeBuyer Report) or Level 3 (Building Survey). Many buyers assume that means a surveyor has climbed up, checked the tiles, tested the leadwork, and poked at the timber battens.

In reality, general building surveyors have to cover the entire property in a couple of hours. Their insurance and health and safety policies usually limit them to inspecting the roof from ground level using binoculars, plus sticking their head through the loft hatch if it's easily accessible and boarded.

Because they can't get up close to hidden valley gutters, rear chimney backs, or flat extensions, they'll often write a standard disclaimer in your report recommending you get a specialist roofer to inspect the roof before you exchange contracts. That's usually the moment homebuyers pick up the phone to us at Trustmark Roofing.

What a Roofer Spots That Binoculars Can't

With over 25 years on the tools, our City & Guilds qualified roofers know the exact weak points where water gets in and where sellers sometimes do a quick patch-up job before putting a house on the market. When we carry out a pre-purchase roof inspection, we look closely at:

• Rotten Eaves Felt and Battens: The bottom two courses of tiles right above the guttering take the brunt of the rain. Old bitumen sarking felt rots away at the eaves, dumping rainwater behind the fascia boards and rotting the rafter feet out of sight.
• Nail Sickness on Slate Roofs: A natural slate roof can look tidy on a dry day, but if the original iron nails have rusted through, those slates are only hanging on by friction. One winter gale and they'll start sliding into the street.
• Hidden Valley Gutters and Chimney Back-Gutters: You cannot see the back of a chimney stack or the bottom of a lead valley from the pavement. Split lead flashing, cracked mortar fillets, and blocked valleys are the number one cause of damp chimney breasts in bedrooms.
• Ageing Flat Roofs (Felt, GRP, or EPDM): Rear kitchen extensions, dormers, and garage roofs are impossible to judge from the ground. We check for pooling water, soft or spongy OSB decking underneath, blistering felt, and delaminating fibreglass edges.
• Spray Foam Insulation Inside the Loft: If the current owner has had spray foam applied directly to the underside of the roof tiles or felt, many UK mortgage lenders will refuse to lend on the property because it traps moisture against the rafters. We spot this immediately and can price up safe removal if needed.

What Happens on the Day of Our Roof Survey?

We keep the whole process straightforward so we don't hold up your house purchase. Once you give us the estate agent's details (or the seller's contact number), we can coordinate access directly so you don't have to take a day off work.

Our CSCS-certified and IPAF-trained roofers attend the property and carry out a methodical external and internal check:

Afterwards, we send you a plain-English report backed up by date-stamped photographs. We split our findings into what needs sorting urgently to make the house watertight, what will need routine maintenance over the next 3 to 5 years, and an honest estimate of the roof's remaining lifespan.

Using Your Roof Report to Renegotiate the House Price

One of the biggest advantages of getting a dedicated roofer out before exchange is financial leverage. If a general homebuyer report vaguely says "the roof is showing signs of age," a seller will usually shrug it off and refuse to drop the asking price.

However, if you hand the estate agent a photographic report from an NFRC and TrustMark-accredited roofing contractor showing rotten battens, split valley lead, and a fixed-price quotation for £2,500 of remedial work—or £12,000 for a full replacement—you have hard figures on the table.

In our experience across Reading, Coley, Tadley, and Oxfordshire, buyers regularly use our survey reports and itemised quotes to either get the seller to pay for the repairs before completion, or knock the cost of the roofing work straight off the purchase price.

Building Regulations & Paperwork to Ask the Seller For

If the seller claims the roof was recently replaced, ask their solicitor for the Building Regulations compliance certificate. Under UK law, if you strip and replace more than 25% of a roof's surface area, it requires Building Control sign-off (or self-certification through the NFRC Competent Person Scheme) and the loft insulation must be upgraded to meet Part L energy efficiency standards.

If a homeowner had a "cash-in-hand" re-roof done without Building Control approval, or if the house is in a local Conservation Area (common around Henley-on-Thames, Oxford, and Wallingford) and wrong materials were used, you could be liable when you eventually come to sell the property yourself. We check that any recent roofing work complies with current British Standards (BS 5534) so you aren't caught out.