What this work involves
Survey covering, junctions and the structure beneath. A leak may appear away from its source. Coordinate maintenance with assessment of insulation and moisture conditions.
- Covering and junction survey
- Substrate and moisture
- Insulation and build-up
- Drainage and penetrations
- Safe access and temporary protection
Use the following design considerations when coordinating this service with a wider project. Agree which parts apply to your request.
Assess frame, reveal, insulation and internal finish as one junction.
What the drawing needs to explain
Place existing and proposed elevations side by side and add a window-opening section. Mark visible changes and elements requiring adaptation inside.
Allow for later maintenance
Keep a record of the differences between existing and renewed details. Include product information and locations of components that must remain accessible.
Which trade-off matters?
New performance and existing proportions need assessment together. A different frame profile can affect glass area, reveals and internal finishes; compare the complete detail, not just the product rating.
Cost factors for this service
Area, roof shape, material, access and substrate repairs determine the budget.
Bring this to the discussion
Photographs, known leaks, approximate area and earlier work.
Questions about the work
Can new covering go over the existing layer?
It depends on material, condition, adhesion, moisture and the complete build-up. Have the roof assessed first.
The design situations here illustrate choices; they are not completed projects or a diagnosis of your property.

