How to compare labour costs for fitting metal roofing

One price may cover only fixing the sheets. Another may include underlay and battens. Flashings and gutters may be separate items. Establish what each contractor will deliver before comparing the headline figure with the total for a watertight roof.

Ask for the work and consumables to be itemised. Identify who supplies screws, tapes and seals. Include removal of swarf and protective film. These small operations affect the finish and should have a clear place in the contract.

Valleys, dormers and chimneys add measurements, cuts and joints. Height and pitch change the time needed for safe access. Floor area alone captures none of this. Rates for a simple shelter make a poor benchmark for a house with a complicated roof.

Site access also matters. Long sheets must be unloaded and lifted without distortion, and limited space may rule out some lifting equipment. Modular sheets are easier to handle, but each piece adds another positioning and fixing operation. Price the proposed method for the actual site.

Measure the sloping roof surface first. Check whether flashings are charged per linear metre, per item or within the base rate. A lump sum cannot be compared directly with one unit rate. Give each roofer the same schedule of quantities to price.

For a 180 m² roof, a unit difference of PLN 20 adds up to PLN 3,600. At the site’s 12 November 2026 rate, that is about €4.63 per m² and €834.20 in total, calculated before rounding. This is an arithmetic example. If the cheaper quote omits flashings worth more than that, the ranking reverses.

Allow for stripping the old covering, temporary weather protection and transporting waste. Battens, decking or structural members may need repair. Some defects appear only when exposed. Agree beforehand how the additional work will be priced and approved.

Separate definite work from provisional repairs. Record discoveries with photographs and a scope description. The customer should understand the extra cost before the area is covered again. This helps distinguish necessary repairs from changes made mainly for site convenience.

Cut-to-length tile sheets can cover regular slopes efficiently if measured correctly. Modules are easier to manoeuvre around complex shapes. T18 and T35 require suitable supports and laps. Installation cost follows the roof details and site conditions, so no single material is always cheapest to fit.

Insulated roof panels combine weather covering and insulation, but require suitable equipment and prepared supports. For a fair comparison with single-skin sheets, include all layers needed to deliver a finished roof with equivalent performance.

Record the scope, price and payment method. Define how area, chimneys and roof windows are measured and what happens to the price if the design changes. Identify scaffolding, lift hire and travel costs so they are visible in both quotations.

Check whether amounts include VAT. The tax treatment of a particular service depends on the circumstances. Ask the contractor for the final payable amount and the basis used. The material price list alone does not determine VAT treatment for the whole job.

Ask about exclusions, the proposed flashings and the team’s experience with the covering. An efficient crew may genuinely be cheaper, or the price may leave work out. Establish what you must supply and what condition the finished roof will be in at handover.

Compare references, handover conditions and records of concealed work. Installation must follow the design and the covering manufacturer’s instructions. A clearly described scope and sound workmanship reduce the risk of expensive remedial work and give a more useful comparison than a national headline rate.