The only situations that underlays are needed is when a floating floor is being installed. It can also be used downstairs and upstairs in the home, although we suggest considering a specific acoustic underlay if noise is an issue. When the heating is switched on, but cool down more quickly too – this applies to all internal insulation. Please note, the impact sound can often be higher than a direct bonded floor and it may not feel as firm, although, that shouldn’t be too much of an obvious problem at 20 mm thick. A thin underlay board to reduce impact sound through timber, concrete and screed floors. A carpeted floor provides a layer of warmth and comfort in the room, as well as damping sound.
If there’s access from below, for example a crawl space or cellar, installing insulation is fairly straightforward. The energy picture within the crawlspace is radiation dominated—the floor assembly surfaces are in essence radiation coupled to the ground. The anti-insulation group believes that not having insulation allows the floors to breath better.
Installed correctly means to the code at the time it was installed not the way it should be. To clear the air, it really does not matter which way the kraft paper faces on the fiberglass insulation when it comes to performing better in a crawl space. In some cases insulation can be fitted between the floor joists but with several models insulation is fitted above the standard floor and therefore requires a final floor covering.
There is a simple formula for the resulting U value of a bridged layer (U= (fractional area 1/R-value for area 1) + (fractional area 2/R-value of area 2)) – if you consider 100mm PIR boards of R~4, and 100mm joists of R~1, then the overall U value of the floor ends up at about 0.34 (neglecting surface resistances and the floorboards themselves). Where you have heavy exercise equipment or where the point loadings are potentially going to be high, then we would recommend putting the insulation between battens. The floor is concrete, with self leveling compound on top (which my husband did).
Your 14″ depth of the space beneath the floor sounds pretty typical and for this depth the advice is that vents should be spaced every 1.5-2m around the outside wall. Finally, some products can be used for sound deadening on wood subfloors with nail or staple type installations. Insulating from under the floor is really only for the adventurous who don’t want to destroy existing floor coverings.
This type of floor construction is used in most domestic properties; the typical floor construction will be plasterboard or lathe and plaster ceilings, timber floor joists and wooden floorboards or chipboard flooring over the top. As long as the existing floor is level, the Tranquility floor is simply laid on top, but if for some reason you are going back to the joists, simply lay chipboard – it can be 18mm so long as the joists are not more than 450mm between centres or 22mm if wider.
Hardwood flooring isn’t a practical covering for most basement slabs because of the potential exposure to moisture and humidity. I’m also of the same opinion as a lot of flooring tradesmen in relation to not feeling fully comfortable using a vapour barrier over floorboards. A hardwood floor needs to be protected from changes in moisture and temperature as much as possible. An U-value is a measure of the thermal insulation of a material with lower U-values being more effective insulators. We recommend one layer only to reduce the risk of unnecessary movement between boards and the floor board.
The product also contributes to increased insulation values, keeping floors warmer in winter months and cooler in the summer. Or, if you have access to the beams from underneath, eg. from a cellar, this job will become much easier because you won’t need to lift the floor. There are two types of underfloor heating available for your conservatory floor insulation.
I unfortunately live in the middle flat and have to contend with squeaky floorboards above me and my neighbour downstairs who has cheap carpets and no underlay. Care should be taken when caring out works to ensure any air spaces beneath the suspended floor are maintained and kept well ventilated to the outside in order to avoid dampness and wood rot. Unfaced batts are the best idea because, while you can use faced batts, this type of insulation is harder to keep up and doesn’t have rigid ends. If this is a problem then 3mm thick hardwood sheets can be fixed down under the underlay and carpet.