As unknown territory for most builders, roof truss costs can quickly escalate without the right builder support. We understand working with self-build and private projects can be time-consuming and complicated, throwing up issues to overcome as the project develops. Roof trusses can be complex and difficult to deliver without the necessary expertise and support to ensure their propriety and quality.
We can work as your support partner throughout construction. With our site surveyor and team of designers, there’s always expert advice and guidance available to make sure you keep roof truss costs to a minimum for your client, with a quality product and service.
As experts in roof trussing, we’re frequently asked questions by building project teams about the design, manufacture and installation process. Here we have outlined some of the more frequent ones in case you find them useful. You can also see a full list of our Frequently asked technical queries.
Timber can be treated to further protect wood from the elements, such as fungal decay and insects (a risk in South East England). The specific risk to your timber will be dictated by your geographic location and where the timber is being used in the construction. It’s an additional cost to have your timber treated (around 10% of the cost of your structure) and the process includes covering your timber with a preservative specifically designed to protect wooden structures from the elements.
Current HSL guidelines have the following advice:
- two person teams – loads up to 48 kg;
- three person teams – loads up to 70 kg;
- four person teams – loads up to 95 kg.
- Trusses that weigh more than 95 kg should not be handled by manual means alone. Some form of mechanisation or mechanical assistance should also be used.
Further recommendations specify that the area where the trusses are to be carried should be kept clear and noise levels should reduced to ensure effective communication between the manual handling team members. For full guidance visit HSE.
You must brace your roof trusses to create a stable structure. Incorrectly installed or non-existent bracing can compromise the trusses, resulting in distortion or structural failure. The Trusted Rafter Association has created an excellent guide to the correct method of bracing your roof system.
As with standard roof trusses, attic truss systems must also be braced to ensure structural integrity, both in the short and the long term. The Trusted Rafter Association has created a specific guide for the bracing of attic trussed roofing systems.
The levels of thermal insulation required for building are set by the Building Regulations and are expressed as a U-value. The required U-value will depend on a number of factors, such as country (England/Wales/Scotland), whether the building is domestic or commercial, whether it’s a new build or existing building, and the actual application itself eg floor, wall, roof. The recommended U-Value for new build, domestic pitched roofs, insulated at ceiling level, is 0.11 and the same build at insulated rafter level is 0.16.
To guarantee sufficient insulation, it goes without saying that sourcing high quality insulation and a professional to install it is important. Suppliers such as Kingspan give excellent advice about their products and their application, such as this Kingspan Guide to Insulation. It’s best to employ the services of a trained expert, competent in calculating U-Values, such as your architect. Skimping on professional advice at this stage could lead to not meeting Building Regulations and having to start over.
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