Roof waterproofing and thermal insulation — service guide
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The roof is the part of a house most exposed to sun, rain and day–night temperature swings. Waterproofing keeps water out of the concrete and the ceilings below; thermal insulation reduces heat transfer inside and eases the load on air conditioning. Many roofs need both, some need only a local repair — and the survey decides.
Systems we install
- Bituminous membrane (rolls): torch-applied layers; suited to flat concrete roofs and protected by a layer above (tiles or a protective coat).
- Liquid waterproofing (acrylic / liquid polyurethane): a seamless layer suited to roofs with many details and around plinths and pipes.
- Spray foam (polyurethane) with a protective coat: thermal and water insulation in one layer; needs UV protection (see foam insulation).
- Thermal boards (extruded polystyrene) under the protection layer or tiles.
The choice depends on the roof’s condition, use (is it walked on?), roof tanks and AC units, and budget. We write the reason for the choice in the quote.
When does a roof need insulation?
- A new roof without insulation, or a finished roof you want protected before the first rain season.
- Damp patches or peeling paint on the ceiling below, especially after rain or around the roof tank.
- Old insulation that is cracked, blistered or lifted at the edges.
- Water pooling for hours after rain because of poor falls.
- Noticeably hot upper floors and high cooling bills.
The Saudi Building Code requires thermal insulation for new residential buildings; for existing buildings insulation is the owner’s decision, informed by the survey.
How we execute
- Survey: roof, falls, drains and old insulation, plus a moisture reading of the ceiling from inside to locate current leaks.
- Preparation: removing or fixing damaged insulation, cleaning, crack treatment, and correcting falls towards drains where needed.
- Primer for adhesion.
- Insulation layers per system, with care at the details: edges and corners (upstands on walls), tank and AC plinths, and drains.
- Flood test: we flood the roof for a set period and check the ceiling below and the edges — no layer is covered before it passes.
- Protection: a UV coat or tiles according to use.
- Documentation: before/during/after photos, materials and batch numbers and the flood-test result in the insulation quality record.
Included and excluded
Included: survey, preparation and local treatment, insulation and protection layers, flood test, documentation and warranty certificate.
Not automatically included: structural work (such as casting entirely new falls), relocating tanks or AC units, and tiling over the insulation unless stated in the quote. Every extra item is written clearly before starting.
How the service runs, step by step
- Booking
Property type, roof area, insulation type and roof condition in the order form.
- Survey and quote
A visit to measure the roof and assess its condition, then a written quote with material, layers and warranty period.
- What we need from you
Clear the roof of movable equipment, provide power and water for the flood test, and point out the leak positions you noticed from inside.
- Execution
From one to several days depending on area, system and weather; we do not apply layers in rain or high humidity.
- Test and handover
A documented flood test, then the warranty certificate and execution record.
What you receive
- A written quote defining material, layers, area and excluded items.
- An execution record: before/during/after photos, materials and batch numbers, flood-test result (when the quality record is enabled).
- A numbered warranty certificate with verify code stating the period, what it covers and what it excludes (such as later structural work or piercing the insulation to fit equipment).
- Roof care guidance: clean drains, do not pierce the insulation, annual check.
How pricing works
Published inspection fee: 150.00 SAR (VAT included). Any further work is quoted after the on-site assessment, in writing, before it starts.
Usually priced per square metre by material, number of layers, roof condition (old insulation removal? fall correction?) and number of details (tanks, AC, openings). We state the rate per item in the quote so you can compare clearly.
Verifying the report and warranty
Every inspection report and warranty certificate we issue carries a serial number, a verification code and a QR code. Enter the code on the verification page to confirm the document really came from us, that it has not been altered or revoked, and the warranty expiry date where one applies. A buyer, landlord or insurer can verify it the same way without contacting us.
Frequently asked questions
Membrane, foam or liquid — what is the difference?
Membrane is torch-applied rolls suited to large flat roofs; foam is sprayed and gives thermal and water insulation together but needs UV protection; liquid is a seamless layer suited to details and complex roofs. The survey picks what fits your roof.
Must old insulation be removed?
If it is sound and bonded we can sometimes work over it after treatment; if blistered or loose it must be removed. We decide by inspection and write it in the quote.
How long is the warranty?
It depends on the material and system and is written in the warranty certificate with what it covers and excludes. We do not state a period before the survey.
Can it be done in summer?
Yes, respecting working hours and roof temperature; rain and high humidity stop the work.
Can I walk on the roof after insulation?
It depends on the system and protection layer. Unprotected foam should not be walked on often; insulation under tiles is used normally.
The ceiling leaks — do I need the whole roof insulated?
Not always. A moisture survey from inside and a local flood test may narrow it to a drain or a tank plinth, making the repair local.
Do you insulate hangar and metal roofs?
Yes, usually with spray foam and a protective coat; see foam insulation.
On-site service is available in Saudi Arabia; the guides and tools can be read anywhere.
This page is informational and educational. Confirming a leak, an insulation condition or a pest infestation always requires an on-site assessment, and structural questions are for a licensed engineer. We do not publish promises we cannot prove.