Select Roofing Services explains how mortgage retention for roof issues works, what lenders commonly ask for, how a retention may be discussed, and how spray foam insulation can affect a valuation. Written by a family roofing firm with 30 years' experience in Formby, Merseyside.

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Buying a Home

Mortgage Retention for Roof Repairs, Explained

Reviewed by Martin, Select Roofing Services — Family roofers in Formby, Merseyside — 30 years on the tools

Quick answer

Mortgage retention is when a lender holds back part of your mortgage until a roof issue flagged by their valuer has been dealt with or assessed. The amount, timescales and release conditions vary, so check your mortgage offer and obtain confirmation from your lender or broker. A written, professionally produced report and a firm quote can help you discuss the issue with your lender or the seller.

Roof under inspection during a survey, relevant to mortgage retention assessment, Merseyside

Illustrative photograph of a roof under inspection.

If your mortgage offer has come back with part of the loan held back “pending roof repairs”, the first step is to read the conditions in your offer and ask your lender or broker exactly what they require. This guide explains what retention is, what lenders commonly ask for, and how a written survey fits in.

  1. What mortgage retention is
  2. Why roofs can trigger it
  3. How much is retained?
  4. Timescales and release
  5. The process, step by step
  6. Can the retention be reduced?
  7. Spray foam insulation
  8. If you are the seller
  9. Documentation lenders may ask for
  10. Common misunderstandings
  11. Frequently asked questions
  12. Summary & next steps

What mortgage retention is

When you apply for a mortgage, your lender arranges its own valuation of the property. This is separate from any survey you commission. If the valuer notes a concern about the roof, the lender may approve the mortgage but hold back part of the loan until the matter is dealt with. This protects the lender while the issue is resolved.

The same principle can apply when remortgaging, including buy-to-let and HMO properties. See our landlord and portfolio roof survey page if this applies to you.

Why roofs can trigger it

Lenders may ask about a roof where the valuer sees things such as:

How much is retained?

There is no single formula. Lenders set the amount themselves, and it may be linked to the repair estimate their valuer makes, sometimes with an allowance on top. A lender is not obliged to match a cheaper quote you obtain. Requirements, timescales and release conditions vary. Check your mortgage offer and obtain confirmation from your lender or broker.

Timescales and release

Requirements, timescales and release conditions vary. Check your mortgage offer and obtain confirmation from your lender or broker. Ask your lender what evidence they need before they release funds, and whether any interest applies to the retained amount.

The process, step by step

  1. Valuation flags the roof. The lender's valuer notes a concern during the mortgage valuation.
  2. Mortgage offer issued. Any retention is shown in your offer documents.
  3. Consider your options. You may cover the shortfall, discuss a price reduction with the seller, or provide further evidence to the lender.
  4. Obtain a written report and quote. A written report and itemised quote are often what lenders ask for.
  5. Complete the purchase, or agree a revised arrangement. Discuss the position with your lender and conveyancer before completion.
  6. Carry out the work and provide evidence. Your lender will tell you what evidence is required for release.

Can the retention be reduced?

It is not guaranteed. A written, professionally produced report and an itemised quote give your lender specific information to consider against their valuer's figure. Whether the lender changes its position is their decision.

Spray foam insulation

Spray foam insulation applied to the underside of roof timbers can make the roof structure harder to inspect, and it can raise questions for valuers and lenders. Some lenders may ask for a specialist inspection before they proceed. Check your mortgage offer and ask your lender what they require.

We have written separate guides on spray foam removal and on spray foam mis-selling and compensation.

If you are the seller

If a buyer's mortgage valuation flags your roof, the sale may be delayed while they consider their options. If you know or suspect a roof issue, you may find it useful to obtain your own written report before you list the property. Our Professional Roof Survey Report is one option.

Documentation lenders may ask for

Requirements vary, but lenders commonly look for:

Lenders may not accept vague or unsigned documentation. Confirm what your lender needs before you commission work.

Common misunderstandings

Frequently Asked Questions

What is mortgage retention on a roof? +

Mortgage retention is when a lender approves a mortgage but holds back part of the loan until a specific issue, commonly a roof issue flagged by the lender's valuer, has been dealt with or assessed. It is separate from any survey you commission yourself.

How much do lenders typically retain for a roof issue? +

Approaches vary by lender, and there is no single standard. The amount is set by the lender, and it does not automatically change because you obtain a different quote. A written, itemised report and quote can support a request for review. Requirements, timescales and release conditions vary. Check your mortgage offer and obtain confirmation from your lender or broker.

How long do I have to complete the work? +

Requirements, timescales and release conditions vary. Check your mortgage offer and obtain confirmation from your lender or broker.

Can I get the retention amount reduced? +

It is not guaranteed. A written, professionally produced report and an itemised quote give your lender something specific to consider alongside their valuer's figure. Your lender decides whether to change the retention.

Can spray foam insulation affect a mortgage? +

It can. Spray foam can make it harder for a valuer or surveyor to inspect the roof structure, which may lead a lender to ask for further information or a specialist inspection. Check your mortgage offer and ask your lender what they require.

Who pays for a specialist report needed by the lender? +

This depends on your transaction. Check with your conveyancer or broker, and confirm with your lender what report they require before you book.

What if I cannot cover the retention shortfall? +

Options depend on your lender and the transaction. Common routes are discussing a price reduction with the seller, asking the seller to complete the work before completion, or speaking to your broker about other lenders. Get advice from your broker or conveyancer.

Do you confirm that work is complete for the lender? +

This is a follow-up visit with written confirmation that the flagged repairs have been completed, which you can send to your lender or solicitor. Requirements, timescales and release conditions vary. Check your mortgage offer and obtain confirmation from your lender or broker.

For more on roof surveys, read our Roof Survey Advice guide.

Summary

A roof-related mortgage retention can complicate a purchase. The lender sets the terms, and written evidence is usually central to the discussion. Check your mortgage offer and obtain confirmation from your lender or broker before making decisions.

Need a written roof survey?

Our Professional Roof Survey Report is a paid written survey for £249 on standard residential roofs, with a PDF report within 3 working days. Submitting an enquiry requests an appointment, which we will confirm.

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