Flat Roof Insulation Building Regs

Flat roof types.

Flat roof insulation building regs.

If you want to carry out repairs on or re cover less than 25 per cent of the area of a pitch or flat roof you will not normally need to submit a building regulations application. The actual specification required for a compliant building and necessary building fabric u value targets may vary depending on the actual overall proposed specification and the outcome of the energy. There are two ways to insulate a roof. Insulation can also help to limit condensation and contribute to acoustic insulation depending on the type of insulation used.

If you are replacing more than 25 of the roofing area then you will also need to replace the thermal insulation. In warm deck roofs however the insulation is positioned above the structural deck. Summary of flat roof building regulations. Rockwool limited registered in england and wales.

Building regulations for insulating a roof heat rises and therefore the building regulations requirements for heat loss through roofs are more stringent than those for walls. The roof thermal insulation would normally have to be improved. Warm deck this is where the insulation is placed on top of the rafters joists and the roof covering is then placed over the insulation. To comply with part l of the building regulations 2010 all roofs to rooms except those in unheated buildings should be thermally insulated to a maximum u value of of 0 18 w m k.

No ventilation is required for these types of roofs. The removal or alteration to any roof elements could affect. Flat roofing insulation will have a huge impact on the energy efficiency of your property. A flat roof must be strong durable and stable throughout its lifetime.

You will need approval however if. It must provide adequate protection against the elements keeping the buildings structure and interior dry. The limiting u value the maximise u value which cannot be exceeded required under current building regulations for the roof is 0 20w m. The type of insulation required will depend on the immediate environment in your area and specific building regulations.

U value of a flat roof. The building regulations for flat roofs can seem like a lot to understand which is why we have put together a simple guide of the things you need to know about when it comes to considering the building regulations for flat roofs. The below drawing shows the u value requirements set out for new properties in the building regulations for each element walls floors and roofs. Cold deck this is where the insulation is placed between the joists rafters or in between the ceiling joists in the case of a pitch roof.

A lower u.