Roof thermal insulation for schools in Allith

Prepared by the technical team · editorial review · last updated 13 November 2026 · Sources

Before we start: what we know about Allith

Main roads in or near Allith: Al Laith Road, Amr Bin Al Aas Street. The centre of Allith sits about 5 m above sea level (SRTM open elevation data).

Allith is about 1.2 km from the sea coast (OpenStreetMap).

Allith sits about 5 m above sea level, and it is roughly 1.2 km from the sea coast, so the first thing checked on a school roof here is the exposure of the roof to salt-laden coastal air and to the moisture that comes with it. Those two facts shape the early assessment: the technician looks at the condition of the existing roof surface, the drainage paths, and any signs that moisture has already reached the ceilings below. Because the school is close enough to the coast for sea air to matter, the surfaces are inspected for corrosion on metal fixings and for any salt deposits or efflorescence that might point to moisture moving through the structure.

Several points cannot be settled from a desk. The exact thermal performance of the existing roof, the true thickness of any old insulation, the slope and condition of the falls that carry rainwater off the roof, and the presence of hidden leaks around plant, skylights or parapets all have to be measured and seen on the site visit. The choice between a liquid roof waterproofing system, a bitumen membrane, or insulation boards on the roof is also left until the visit, since it depends on what the roof structure can carry and how the building is used. Where cracks or gaps are found in the roof edges or upstands, the length to be repaired is measured on site, because crack injection is priced per metre and the true length is not known until it is checked.

To help the technician, the school should be ready to share the roof plan, any previous repair records, and notes on when leaks have been seen and after which kind of weather. Access arrangements should be confirmed in advance, including safe routes onto the roof and any times when classrooms below can be cleared or kept quiet. For budgeting, the technician will want to know the total roof area in square metres, since the main materials are priced per square metre: liquid roof waterproofing at SAR 8–25 per m², bitumen membrane at SAR 15–35 per m², and XPS boards at SAR 12–30 per m². Clear information at this stage lets the site visit focus on the questions that only a person standing on the roof can answer.

For schools, the larger jobs are planned for weekends and holidays.

Signs worth paying attention to

The following signs are worth checking before they grow:

• The ceiling stays hot at night
• Strong heat on the top floor
• The AC runs for long hours in summer

The most common causes

• A common cause: old insulation that has deteriorated.
• A common cause: no thermal insulation under the roof protection.

How we choose the tool in Allith

The steps in order

1. Thermal survey: Hot areas of the roof are mapped.
2. Choosing the system: The material and thickness are agreed in the quote.
3. Installation: The layer is installed and protected.
4. Measurement and documentation: Thickness is measured at spread-out points.

Quick comparison: facts and costs in Allith

Short answers for Allith

What we advise against

• Relying on reflective paint alone on an uninsulated roof

What you get after the work

The written output: the documented thickness, materials and batch numbers. The report is numbered and can be checked with its verification code.