Suspended Timber Floor Insulation Detail

Best practice for insulating a suspended timber floor part 2.

Suspended timber floor insulation detail. Previously floor timbers had been prone to damp and rot thanks to their direct contact with the moist ground. A suspended timber floor tends to be cold and draughty because of the air circulating beneath it. To ensure that the floor is thermally insulated either rigid or blanket insulation is placed between the floor joists. There are a variety of options for the material used in suspended timber floor insulation.

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. The quilted insulation is supported by netting stapled to the joists while the rigid insulation can be supported on battens between the joists. Suspended hollow or timber floors also have a tendency to creak as the nails work loose over time. 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.

Installing any amount of insulation will warm the floorboards and go a long way towards eliminating draughts. The answer to this problem can also be found in our project about stopping creaking floors and stairs. Materials for suspended timber floor insulation. 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.

Insulating a suspended timber floor. The effect is a greater sense of comfort and that in turn allows the homeowner to turn the. I can t get a definitive idea of the best way to do it. 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.

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.