Need It Today? Free In Store & Pickup / Order over £999 to avail free delivery

  • Call us free 24/7 : +447510000058

Which underlay do I need with my floor?

Firstly, what is an underlay?

A sheet of material called an underlay is placed between the subfloor and the floor. It helps hide minor subfloor irregularities and maintains the floor level and stability while also acting as a sound and heat insulator.

Various underlay types are available according to your demands, therefore we've compiled a list of some of the more popular ones for your convenience.

Damp Proof Membrane (DPM) Underlays

A Damp Proof Membrane is a feature of all of these underlays (DPM). When installing over concrete subfloors or to shield your flooring from moisture coming from below, this is important.


T-build Bronze

For any installation on concrete, a DPM (damp proof membrane) layer that is integrated into the 3mm thick foam of this product is essential. It is light and simple to handle, and it fits and cuts easily. Fair sound absorption and heat insulation capabilities. It can be used both downstairs and upstairs of the house, though if noise is a problem, we advise taking into account a particular acoustic underlay.

T-build Silver Acoustic

As a good economical option, T-build Silver Acoustic provides good comfort, support, and recuperation. When bonded to a high-density foam core with strong compressive strength, a silver foil vapour barrier with a 200mm overlap serves as a fantastic DPM to protect your floor from moisture. Strong 18db sound impact reduction and thermal insulation properties. Although we advise taking into consideration a specific acoustic underlay if noise is an issue, it may also be utilised downstairs and upstairs in the house.

T-build Gold Acoustic

The remarkable performance of T-build Gold Acoustic provides comfort, support, and acoustic reduction of nearly 24dB. This product is perfect for underfloor heating systems because it also has good thermal insulation qualities. Minor floor flaws will be efficiently evened out by this non-toxic, non-dusting product. A high-density foam core with high compressive and recovery strength is bonded to a gold foil vapour barrier with a 200mm overlap, which serves as an excellent DPM to protect your floor from moisture.

Rapid Combifloor Plus

All T-build floors are compatible with this underlay. A built-in damp-proof membrane, which is necessary for concrete subfloors, is included in this underlay. It effectively reduces noise both within the room and downstairs. To be in compliance with the T-build Warranty, T-build underlay must be used.

T-build Unisound Combiflor

In addition to reducing noise from high heels and other sources inside the room, T-build Unisound Combiflor protects against rising moisture and is appropriate for underfloor heating. has DPM integrated. To be in compliance with the T-build Warranty, T-build underlay must be used.

Foam Underlays

These foam underlays are useful when a DPM is not always necessary. They aid in sound and heat insulation, and if necessary, they can still be installed with a DPM.

T-build Laminate Foam Underlay

An effective fundamental underlay that can be applied to any wooden subfloor. Use over concrete floors requires the installation of a damp-proof membrane first. To be in compliance with the T-build Warranty, T-build underlay must be used.

T-build Underlayment Foam

Use T-build foam underlay with laminate or wood flooring for the best results. The 2mm thick P.E. poly foam underlay lacks a DPM but does provide some sound and thermal insulation. The best application for this underlay is over chipboard or wood subfloors. Cut lengths to the nearest 1m2 are offered for sale.