Suspended Timber Floor Insulation Detail

The main elements during construction of the suspended timber floor are loading of joists positioning of joists the spacing of joists evenly spaced joists and sizes of joists.

Suspended timber floor insulation detail.

Suspended timber floors located above an unheated space where the insulation is installed below the floorboards or timber decking timber floors situated above an unheated integral garage. Some support may be needed for the insulation timber straps timber battens or netting can all be utilised to help keep the insulation in place. I m 70 of the way through an eco retrofit of a 1940s bungalow windows already in place but still have about 30 m 2 of suspended timber floor to insulate and air seal. Materials for suspended timber floor insulation.

There are a variety of options for the material used in suspended timber floor insulation. The floor would typically be finished from above with a vapour control layer vcl if required and a suitable timber floor deck. A disadvantage can be an unacceptable raising of the floor level necessitating step ups or alterations to details at door openings electrical sockets etc. Where insulation cannot be installed from below say above a jetty insulating above a suspended timber floor prevents damage to floorboards caused by lifting them.

This is a floor where the timber floorboards are attached to floor joists and the insulation suspended on timber battens between the joists. The building detail is for illustrative purposes only. Best practice for insulating a suspended timber floor part 2. Previously floor timbers had been prone to damp and rot thanks to their direct contact with the moist ground.

I can t get a definitive idea of the best way to do it. While knauf insulation offer various insulation products into suspended ground floor applications we would emphasise that site specific conditions should always be considered on a case by case basis and any generic product recommendations must always be subject to an onsite evaluation. In this blog post we aim to provide a simple practical guide to the best practice methods for fitting insulation boards such as kingspan kooltherm k103 floorboard into a suspended timber floor. At the turn of the 18th century when construction techniques moved from boarded floors installed directly on the ground to suspended timber floors over a ventilated chamber the innovation solved a significant problem.