Project: Chorley Houses
Address: Hodson Homes Housing Site, Land at end of millstone Close Whittle-Le-Woods, Chorley, PR6 7FP
Contractor: Hodson Homes
Roof size: 287m2 in total
Roof A122m2
Roof B 93m2
Roof C46m2
Roof D10m2
Roof E12m2
Roof F4m2
Roof system: Roof A, B, C Sikaplan SGmA – 20 Year Guarantee, Roof D, E, F Sikaplan G 1.8mm Lead Grey – 20 Year Guarantee
About the project:
The development at Hill Top Lane in Whittle-le-Woods saw the creation of 135 new homes, divided across two areas, with 60 properties on the northern plot and 75 on the eastern side. Around 30% of the homes have been created to be affordable housing, and each of the properties has an electric vehicle charging point. The scheme aimed to provide much-needed homes for Chorley and nearby communities, all within a sustainable setting. The design of the houses was intended to complement the scenic character of Whittle-le-Woods.
Our role in the project:
Here at Enviroply Roofing, we installed a number of different Sikaplan roofing systems for the Chorley Houses development. These systems were chosen to meet the different requirements of the roof spaces, and to ensure a high quality result. We began the installation on 04/07/2024.
We installed a Sikaplan SGmA single-ply membrane for roof systems A to C. As a multi-layer synthetic waterproofing sheet, this product combines a high-quality polyvinyl chloride (PVC) base, and a glass non-woven inlay, for excellent qualities and performance. This product is particularly renowned for its water vapour permeability, and strong resistance to common environmental factors. For the Chorley Houses development, the SGmA membrane was a highly effective option for the green roof areas..
For roofs systems D to F we installed the Sikaplan G 1.8mm single ply membrane. Made from several layers, this synthetic roofing membrane is reinforced with polyester and built on a polyvinyl chloride (PVC) base. It also includes UV stabilisers and flame-retardant properties for added durability and protection.This was a fantastic choice for the Chorley Houses development, as this membrane offers outstanding UV and wind resistance, as well as resistance to a range of environmental issues, and a high water vapour permeability. This ensures a long lasting and effective result for the new properties.
For the other layers of the roofing build up, we installed the Sarnavap 500E SA and Sikatherm PIR AL Insulation.
The Sarnavap 500E SA is a self adhesive Air and Vapour Control Layer (AVCL). As a foil faced reinforced bituminous membrane, this offers a high level of water vapour resistance, designed to protect the rest of the roof structure from damage caused by water vapour or condensation. In addition, the Sarnavap 500E also boasts an impressive amount of durability and flexibility.
Sikatherm PIR AL insulation boards were installed. These boards are lightweight but strong, faced on both sides with aluminium composite foil, which is bonded to the core, creating an insulation layer that is durable, resistant and lightweight, with a high level of tensile strength.This also offers a high level of thermal resistance, reducing heat loss from the homes in the winter, and keeping the houses cooler in the summer.
The Result at Chorley Houses
We completed this project on 21/03/2025, and all parties were happy with the results. Our installation met all of the standards to achieve a 20 year guarantee.
