4. Handing and Dry Fitting Fibre Glass Mat

Matrix Chopped Strand Roofing Mat (CSM) is available in various weights expressed in gm/m2 . Common weights of CSM include 300gm/450gm/600gm
We recommend using 450gm CSM x 75mm bandage and 1 layer x 600gm CSM for the main laminate.
Balconies can be constructed using 2x 450gm layers with staggered joins and no overlaps
CSM quality varies considerably. Do not use poor quality mat –it is not suitable for roofing applications and will not save you money long-term. Call backs are expensive.
We can only issue a Premium guarantee for laminates made from first quality Matrix CSM.
Mat must be kept dry. Water contamination cannot be reversed and damp mat will fail.
Cut mat with a sharp Stanley knife. Or tear mat against a straight edge on the deck for a feather edge.
CSM should be dry fitted on the deck and then re-rolled and put aside for use later.
It is often best to start at the drip edge and lay the mat parallel with the drip trim.
CSM has two edges – a sharp cut edge and a feathered edge. Overlap the feathered edge onto the cut edge where possible – it will help disguise the joints.
Overlap the CSM joints a minimum of 50mm.
Overlap the glass onto the trims by approx 50mm.
The main laminate should not be visible from the ground and should terminate on the deck
Check you have sufficient bandage to complete trim to deck joints, board joints (if you are not using T&G boards) and details (up-stands, downpipes, corners etc).
Matrix CSM is supplied in approx 30kg rolls. Bandage is supplied in 75M x 75mm rolls.
To calculate m2/roll: divide the weight of the roll by the weight of the glass/m2.
For example a 33kg roll of 600gm CSM is approx 55m2 (30kg/0.6kg = 55m2)

Next section: Mixing Matrix Premium Resin, Matrix Topcoat and Catalyst >