Warm Roof Insulation Regulations

The insulation material for a warm flat roof should.

Warm roof insulation regulations.

Your conservatory roof exemption may no longer apply. 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. These are expressed as a u value which needs to be achieved. Be able to cope with extremes of temperature and uv light without deterioration in thermal performance.

In certain circumstances an existing conservatory or porch can no longer be considered exempt from the requirement of building regulations if the amount of glazing in either the walls or roof is significantly reduced by further work or. A letter dated 30th july 2013 and issued by the department for communities and local government. Depending on the type and thickness of insulation used warm moist air will be controlled accordingly preventing any or too much warm air meeting the cold air layer thus negating a condensation risk or actuality. No ventilation is required for these types of roofs.

A vapour control layer would ordinarily be placed at above ceiling level. A qualified roofing contractor will be able to advise on this but here are some of the main guidelines. Be durable and suitable for external use. Walls are defined by regulation 2 3 of the building regulations 2010 as being thermal elements.

The limiting u value the maximise u value which cannot be exceeded required under current building regulations for the roof is 0 20w m. There must be a slope of 1 80 part h of the building regulations regarding drainage state that water should drain to one or two edges waterproofing should extend up the adjacent walls at least. Be able to resist pressure from any anticipated foot traffic. Making significant changes to thermal elements walls roofs or floors would normally require building regulations approval and require the thermal insulation of the element to be upgraded to a reasonable standard.