Why Dowlas (Parent)

Maximum insulation, minimum effort

Our all-timber conservatory roof replacements transform poorly insulated spaces susceptible to cold spots, draughts, and unsightly condensation issues into glorious spaces that truly stay warm all year round.

Renowned for its environmental benefits, timber boasts the lowest CO2 cost of any commercially available building material. Organic, non-toxic, and naturally renewable, timber is an effective carbon-neutral material –  where for every cubic metre of wood used in place of other building materials, o.8 tonnes of CO2 is saved from the atmosphere.

Essential technical specifications:

• C24 timber used for its eaves beam, wall plates, eaves infills, ridges, Hips, and structural jointing timbers
• Hips and ridges cut to angles required, then bonded with PU adhesive and mechanically fixed in our factory
• 144mm thick SIPs (structural insulated panels), consisting of two 11 mm OSB/3 facings filled with 122 mm rigid polyurethane foam
• Complete with modern box gutter system that can be elevated if required, providing a wider opening for easier cleaning and greater capacity and flow
• Standard Warm Roof Pro achieves impressive U-values of 0.18 W/m2.K
• Outstanding U-values of just 0.10 W/m2.K possible using insulated plasterboard

Strong and safe

Our professional partner, ASW Consultants Ltd, has access to Surveyors Nationwide and can undertake the Building Regulation Application process on your behalf from commencement to completion of your project to ensure that all functional requirements are met.

To obtain ASW Consultants Ltd’s approval, we were required to load 60kg per m2 (for European Standards) and 70kg per m2 (for British building standards). This weight was to remain in situ for one week, followed by two days at 100kg per m2. We felt this was inadequate for the strength of Warm Roof Pro, so we immediately loaded it to 75kg per m2 for one week and upped this weight to 108kg per m2 for an additional two days. This roof was 6m x 6m and free-standing with only 3mm of spread.

All legal required documentation will be provided upon satisfactory completion of your project. ASW Consultant Ltd can also provide a one-stop shop for all associated project design needs, such as thermal calculations and structural designs.