Plain-English explainer
Lender concerns are usually about risk and evidence, not simply whether a homeowner likes or dislikes the insulation.
Security and resale risk
A lender wants to know that the property can be valued, inspected, insured, sold and maintained. If spray foam creates uncertainty about the roof structure or future marketability, the lender may treat that uncertainty as a risk.
Inspection difficulty
If foam covers rafters, felt, battens or other roof components, a surveyor may not be able to see whether timber is dry, sound and ventilated. That can make it harder to confirm the condition of the roof.
Paperwork gaps
Concerns become stronger where there is little paperwork: no proper product details, no installer records, unclear guarantees, missing ventilation explanation or no independent inspection. Good paperwork does not guarantee acceptance, but missing paperwork can make the issue harder to resolve.
How to respond
The most practical response is to gather the exact lender or surveyor wording, then match evidence to each concern. A generic complaint is usually weaker than a focused pack showing installation details, roof condition, ventilation, costs and the impact on sale or mortgage.
Common questions
Can a surveyor change their view?
Sometimes further evidence helps, but it depends on the original concern and the lender policy.
Should I remove spray foam immediately?
Do not assume removal is the answer without understanding the lender or surveyor concern and the cost evidence.
Can finance paperwork matter?
Yes, especially where the installation was sold with finance or representations about mortgageability.
Useful next steps
If this topic matches your situation, these related pages can help you move from background reading to evidence organisation or the right support route.