Is renewal the appropriate route?
Recurring faults, widespread deterioration or damage below the surface can make renewal sensible. Ask the assessment to explain why replacement is proposed and how a local repair compares. A roof's age by itself is not a complete diagnosis.
Assess the existing roof build-up
The existing covering, deck and concealed layers need consideration. Retaining or overlaying material must be suitable for the chosen design. Agree how damp or damaged areas found during removal will be recorded and how changes to the scope will be handled.
Choose the replacement specification
Choose a covering together with compatible insulation and moisture-control details. Felt, EPDM and GRP are options to compare, not substitutes for deciding the build-up. Establish the requirements for the actual project and who confirms the specification.
Resolve drainage and edge details
Review falls, outlets, wall junctions and edge details during renewal. Repeating an ineffective drainage arrangement can preserve the old problem under a new covering. Include associated gutter or downpipe interfaces where they affect the roof's discharge.
Compare proposals and request a quote
Compare quotations that state what is removed, retained and installed. Include access, disposal, protection, junctions and assumptions about hidden conditions. Explain the building use and any restrictions on the work so the proposal reflects the whole project.
Your questions, answered.
Can the old flat roof covering remain underneath?+
Only where the existing condition and proposed system make retention suitable. An overlay should be an assessed design choice.
Does replacement always include a new deck?+
No. Its condition and suitability determine what can remain; the quotation should state the assumptions.
Should insulation and drainage be reviewed during renewal?+
Yes. Renewal is a useful point to assess these together rather than reproduce unresolved weaknesses.
