|Type:||Waterproof Membrane||Place of Origin:||Tamil Nadu India||Brand Name:||Water Reed|
|Type::||Other Waterproofing Materials||Color::||White Yellow||Package::||in bundle|
|Quality::||high||Usage::||for thatching roof||Material::||Water Reed|
|Packaging Detail:||in bundle or sheaf, we also can do as your request.|
|Delivery Detail:||within 7 days after receiving your Order|
dry and no leafage
natural for roof thatching
natural golden, durable and waterproof
size can do as your request
The introduction of insulation over a ceiling creates a ‘cold roof’
Roofing felt significantly reduces the air movement in the roof space.
Moist air from the accommodation readily finds its way into the roof space through the ceiling and holes in ill-fitting hatches.
The amount of evaporation that can take place within the roof is considerably reduced by the introduction of the roofing felt.
Increased amounts of dampness and moist air are now present within the roof space.
The timbers in the roof space are therefore increasingly subjected to the conditions conducive for active fungal decay and wood boring insect infestation.
Any drop in the air temperature provides the atmospheric conditions for the condensation of the moist air to take place.
The impervious roofing felt provides a high level of resistance to the passage of water vapour and a cold contact surface upon which warm moist air can condense. In these circumstances the rafters in contact
with the felt may remain damp most of the time, causing the surface of the rafter to become stained and, in the worst case, rotten.
As can be seen, the introduction of both a roofing felt and insulation has provided an environment susceptible to condensation, which in turn increases the risk of dampness and associated timber defects.